Document:

<PAGE>
                                                                    EXHIBIT 10.4

                       AMENDMENT NO. 1 TO PROMISSORY NOTE

         This Amendment No. 1 to Promissory Note (this "Amendment"), dated as of
October 30, 2003, is by and between World of Outlaws, Inc., a Texas corporation
("Maker"), and Boundless Track Operations, Inc. (f/k/a Boundless Motor Sports
Racing, Inc.), a Nevada corporation ("Payee"). Maker and Payee are sometimes
each referred to herein as a "Party" and collectively, as the "Parties".

                                    RECITALS

         A. Maker previously borrowed $600,000 from Payee, and in connection
therewith, Maker executed and delivered to Payee a promissory note, dated June
26, 2003, in the original principal amount of $600,000 (the "Note"). All
capitalized terms not otherwise defined herein have the meanings set forth in
the Note.

         B. Maker has requested that Payee loan an additional $600,000 to Maker
(the "Additional Advancement") to assist Maker in paying the points fund to be
distributed to drivers and teams during the O'Reilly World of Outlaws Series
season finale banquet to be hold in Las Vegas on November 2, 2004 (the "Points
Fund Distribution").

         C. The Parties desire to amend the Note to the extent provided below.

         D. NOW, THEREFORE, in consideration of the mutual covenants set forth
herein and for good and valuable consideration, the adequacy, receipt and
sufficiency of which are hereby acknowledged, the Parties hereby agree as
follows:

                                   AGREEMENTS

         1. Upon execution and delivery of this Amendment by the Parties, Payee
shall deliver to Maker $600,000. Effective as of the date hereof, the principal
of the Note is hereby changed to $1,200,000, and the Note is hereby amended
accordingly.

         2. Maker agrees to shall use the proceeds from the Additional
Advancement solely to pay the Points Fund Distribution.

         3. The Parties shall cause this Amendment to be attached to the Note.

                                  MISCELLANEOUS

         1. Except as modified and amended hereby, the Note is and shall remain
in force and effect in accordance with its terms.

         2. This Amendment may be executed in several counterparts, all of which
are identical, each of which shall be deemed an original, and all of which
counterparts together shall constitute one and the same instrument.

         3. This Amendment shall be governed by and construed in accordance
with, the laws of the State of Texas, regardless of the laws that might
otherwise govern under principles of conflicts of laws applicable thereto.

<PAGE>

         EXECUTED as of the date first above written.

                                        WORLD OF OUTLAWS, INC.

                                        By:
                                           -------------------------------------
                                            Ted Johnson, President

                                        BOUNDLESS TRACK OPERATIONS, INC.

                                        By:
                                           -------------------------------------
                                            Paul Kruger, Chief Executive Officer

                                        2<PAGE>
                                                                    EXHIBIT 10.5

                       AMENDMENT NO. 2 TO PROMISSORY NOTE

         This Amendment No. 2 to Promissory Note (this "Amendment"), dated as of
November 28, 2003, is by and between World of Outlaws, Inc., a Texas corporation
("Maker"), and Boundless Track Operations, Inc. (f/k/a Boundless Motor Sports
Racing, Inc.), a Nevada corporation ("Payee"). Maker and Payee are sometimes
each referred to herein as a "Party" and collectively, as the "Parties".

                                    RECITALS

         A. Maker executed and delivered to Payee a promissory note, dated June
26, 2003, as amended, in the original principal amount of $600,000 (the "Note").
All capitalized terms not otherwise defined herein have the meanings set forth
in the Note.

         B. Maker, Payee and Ted Johnson are parties to that certain Stock
Purchase Agreement, dated as of August 13, 2003, as amended (the "Purchase
Agreement").

         C. The Parties desire to amend the Note to the extent provided below.

         D. NOW, THEREFORE, in consideration of the mutual covenants set forth
herein and for good and valuable consideration, the adequacy, receipt and
sufficiency of which are hereby acknowledged, the Parties hereby agree as
follows:

                                   AGREEMENTS

         1. Section 1 of the Note is hereby amended to read in its entirety as
follows:

                  "1. Payments. The entire principal balance of, and accrued
         interest on, this Note is due and payable in full on May 10, 2004;
         provided, however, that the entire principal balance of, and accrued
         but unpaid interest on, this Note, shall be deemed to have been paid in
         full upon consummation of the Closing (as defined in the Purchase
         Agreement). From and after the date of this Note the unpaid principal
         balance of this Note shall accrue interest at the rate of four and one
         quarter percent (4.25%) per annum through maturity. After maturity, the
         unpaid principal balance of this Note shall bear interest at the rate
         of eight percent (8%) per annum (calculated on a 365-day year)."

         2. The Parties shall cause this Amendment to be attached to the Note.

                                  MISCELLANEOUS

         1. Except as modified and amended hereby, the Note is and shall remain
in force and effect in accordance with its terms.

         2. This Amendment may be executed in several counterparts, all of which
are identical, each of which shall be deemed an original, and all of which
counterparts together shall constitute one and the same instrument.

<PAGE>

         3. This Amendment shall be governed by and construed in accordance
with, the laws of the State of Texas, regardless of the laws that might
otherwise govern under principles of conflicts of laws applicable thereto.

         EXECUTED as of the date first above written.

                                      WORLD OF OUTLAWS, INC.

                                      By:
                                         --------------------------------------
                                         Ted Johnson, President

                                      BOUNDLESS TRACK OPERATIONS, INC.

                                      By:
                                         --------------------------------------
                                         Paul Kruger, Chief Executive Officer

                                       2<PAGE>
                                                                    EXHIBIT 10.6

                                PLEDGE AGREEMENT

         This Pledge Agreement ("Agreement") is made and entered into as of June
26, 2003, by and between Boundless Motor Sports Racing, Inc., a Nevada
corporation ("Secured Party"), and Ted Johnson ("Pledgor").

                                       I.
                       COLLATERAL AND SECURED INDEBTEDNESS

         1.1 Grant of Security Interest. Pledgor is the sole shareholder of
World of Outlaws, Inc., a Texas corporation (the "Company"). Pledgor hereby
assigns and pledges to Secured Party, and hereby grants to Secured Party a
security interest in, 10,000 shares (the "Shares") of the common stock, no par
value per share, of the Company owned by Pledgor, as evidenced by a certificate
delivered to Secured Party simultaneously with the execution of this Agreement;
and all distributions, fees, dividends, preferences, payments and other benefits
which Pledgor is now and may hereafter be entitled to receive with respect to
such shares; and all proceeds (cash and non-cash) arising out of the sale,
exchange, collection or other disposition of all or any portion of the Shares
(collectively, the "Collateral"). In the event that Pledgor receives any
additional shares of capital stock of Secured Party by way of a stock split or
stock dividend, the Pledgor shall promptly deliver to the Secured Party
certificates evidencing such shares along with appropriate stock powers duly
endorsed in blank.

         1.2 Secured Obligations. This Agreement and the security interest
herein created shall secure full and punctual payment and performance of the
following indebtedness, duties and obligations (hereinafter collectively called
the "Secured Obligations"):

               (a) All principal, interest, fees and other amounts payable to
the Secured Party pursuant to the terms and provisions of that certain
Promissory Note, of even date herewith, issued by the Company to Secured Party
in the original principal amount of $600,000 (the "Note"), including all
extensions, renewals, modifications, increases or substitutions thereof; and

               (b) All interest, charges, expenses, attorney's and other legal
fees and any other sums incurred by Secured Party in connection with the
enforcement of Secured Party's rights and remedies hereunder.

                                      II.
               REPRESENTATIONS AND WARRANTIES; FURTHER ASSURANCES

         2.1 Representations and Warranties. Pledgor hereby represents and
warrants to Secured Party as follows:

               (a) Pledgor has good and marketable title to the Collateral free
and clear of any lien, security interest, shareholders agreement, calls, charge
or encumbrance, except for the security interest created by this Agreement in
favor of the Secured Party. No financing statement or other instrument similar
in effect covering all or any part of the Collateral is on file in any recording
office, except as may have been filed in favor of Secured Party relating to this
Agreement.

<PAGE>

               (b) Pledgor is the sole shareholder of the Company, and the
Shares constitute all of the issued and outstanding shares of capital stock of
the Company. Pledgor, as the sole shareholder of the Company, expects to derive
substantial benefit as a result of the making of the loan by Secured Party to
the Company, and has guaranteed the payment of such loan to the extent of the
Collateral.

               (c) Pledgor has the lawful right, power and authority to grant a
security interest in the Collateral. This Agreement, together with all filings
and other actions necessary or desirable to perfect and protect such security
interest, which have been duly taken, create a valid and perfected first
priority security interest in the Collateral securing the payment and
performance of the Secured Obligations.

                                      III.
                              DEFAULT AND REMEDIES

         3.1 Events of Default. An Event of Default (herein so called) shall
exist upon the failure of Pledgor to make when due any scheduled payment under
the Note or any other Secured Obligations.

         3.2 Remedies of Secured Party. Upon the occurrence of an Event of
Default:

               (a) Secured Party may, without notice or demand, accelerate the
maturity of the Note and declare the entire unpaid principal balance and accrued
interest at once due and payable.

               (b) Secured Party may, at Secured Party's option and at the
expense of Pledgor, either in Secured Party's own right or in the name of
Pledgor and in the same manner and to the same extent that Pledgor might
reasonably so act if this Agreement had not been made,

                  (i)      do all things requisite, convenient, or necessary to
                           enforce the performance and observance of all rights,
                           remedies and privileges of Pledgor arising from the
                           Collateral, or any part thereof, including, but not
                           limited to, compromising, waiving, excusing, or in
                           any manner releasing or discharging any obligation of
                           any party to or arising from the Collateral;

                  (ii)     sue or otherwise collect and receive money
                           attributable to the Collateral; and

                  (iii)    exercise any other lawfully available powers or
                           remedies, and do all other things which Secured Party
                           deems requisite, convenient or necessary or which the
                           Secured Party deems proper to protect the security
                           interest herein granted.

               (c) Secured Party may foreclose this Agreement in the manner now
or hereafter provided or permitted by law and shall have the immediate right to
receivership pending foreclosure, and may upon such reasonable notification
prior thereto as may be required

                                       2
<PAGE>

by applicable law (Pledgor hereby agreeing that 10 days notice is commercially
reasonable), sell, assign, transfer or otherwise dispose of the Collateral at
public or private sale, in whole or in part, and Secured Party may, in its own
name or as the irrevocably appointed attorney-in-fact of Pledgor effectively
assign and transfer the Collateral, or any part thereof, absolutely, and execute
and deliver all necessary assignments, conveyances, bills of sale and other
instruments with power to substitute one or more persons or corporations with
like power. Any such foreclosure sale, assignment, or transfer shall, to the
extent permitted by law, be a perpetual bar, both at law and in equity, against
Pledgor and all persons and corporations lawfully claiming by or through or
under Pledgor.

               (d) Any such foreclosure sale may be adjourned from time to time
provided that at least ten days notice of the continuation of such sale is given
to Pledgor. Upon any sale, Secured Party may bid for and purchase the
Collateral, or any part thereof, and upon compliance with the terms of sale may
hold, retain, possess and dispose of the Collateral, in its absolute right
without further accountability. Secured Party shall have the right to be
credited on the amount of its bid a corresponding amount of the Secured
Obligations as of the date of such sale.

         3.3 Application of Proceeds. Except as otherwise required by applicable
law, Secured Party may apply the proceeds of any foreclosure sale hereunder as
follows:

               (a) first, to the payment of all costs and expenses of any
foreclosure and collection hereunder and all proceedings in connection
therewith, including reasonable attorneys' fees;

               (b) then, to the reimbursement of Secured Party for all
disbursements made by Secured Party for taxes, assessments or liens superior to
the security interest hereof and which Secured Party shall deem expedient to pay
in order to protect its interest in the Collateral;

               (c) then, to the reimbursement of Secured Party of any other
disbursements made by Secured Party in accordance with the terms hereof;

               (d) then, to or among the amounts of fees, interest and principal
then outstanding and unpaid in respect of the Secured Obligations, in such
priority as Secured Party may determine in its discretion; and

               (e) the remainder of such proceeds, if any, shall be paid to the
record owner of the Collateral.

         3.4 Enforcement of Secured Obligation. Nothing in this Agreement or in
any other agreement shall affect or impair the unconditional and absolute right
of the Secured Party to enforce the Secured Obligations as and when the same
shall become due in accordance with the terms of the Note or other documents
evidencing the Secured Obligations.

                                       3
<PAGE>

                                      IV.
                             RIGHTS OF SECURED PARTY

         4.1 Subrogation. Upon the occurrence of an Event of Default, Secured
Party, at its election, may subrogate to all of the interest, rights and
remedies of Pledgor, in respect to any of the Collateral or agreements
pertaining thereto.

         4.2 Secured Party Appointed Attorney-in-Fact. Pledgor hereby
irrevocably appoints Secured Party as attorney-in-fact of Pledgor, with full
authority in the place and stead of Pledgor and in the name of Pledgor, Secured
Party or otherwise, from time to time on Secured Party's discretion and upon the
occurrence of an Event of Default, to take any action and to execute any
instrument which Secured Party may deem necessary or advisable to accomplish the
purposes of this Agreement, including without limitation: (a) to ask, demand,
collect, sue for, recover, compound, receive and give acquittance and receipts
for moneys due and to become due under or in respect of any of the Collateral;
and (b) to assign and transfer the Collateral, or any part thereof, absolutely
and to execute and deliver endorsements, assignments, conveyances, bills of sale
and other instruments with power to substitute one or more persons or
corporation with like power.

         4.3 Performance by Secured Party. If Pledgor fails to perform any
agreement contained herein, Secured Party may itself perform, or cause the
performance of, such agreement, and the reasonable expenses of Secured Party
incurred in connection therewith shall be payable by Pledgor under Section 4.8.
In no event, however, shall Secured Party have any obligation or duties
whatsoever to perform any covenant or agreement of Pledgor contained herein, and
any such performance by Secured party shall be wholly discretionary with Secured
Party.

         4.4 Duties of Secured Party. The powers conferred upon Secured Party
hereunder are solely to protect its interest in the Collateral and shall not
impose any duty upon it to exercise any such powers. Except for the safe custody
of any Collateral in its possession and the accounting for money actually
received by it hereunder, Secured Party shall have no duty as to any Collateral
or as to the taking of any necessary steps to preserve rights against prior
parties or any other rights pertaining to any Collateral.

         4.5 No Liability of Secured Party. Neither the acceptance of this
Agreement by Secured Party, nor the exercise of any rights hereunder by Secured
Party, shall be construed in any way as an assumption by Secured Party of any
obligations, responsibilities or duties of Pledgor arising in connection with
the Collateral assigned hereunder or otherwise bind Secured Party to the
performance of any obligations respecting the Collateral, it being expressly
understood that Secured Party shall not be obligated to perform, observe or
discharge any obligation, responsibility, duty, or liability of Pledgor in
respect of any of the Collateral, including, but not limited to, appearing in or
defending any action, expending any money or incurring any expense in connection
therewith.

         4.6 Right of Secured Party to Defend Action Affecting Security. Secured
Party may, at the expense of Pledgor, appear in and defend any action or
proceeding at law or in equity purporting to affect Secured Party's security
interest under this Agreement.

                                       4
<PAGE>

         4.7 Right of Secured Party to Prevent or Remedy Default. If Pledgor
shall fail to perform any of the covenants, conditions and agreements required
to be performed and observed by Pledgor in respect of the Collateral, Secured
Party (a) may but shall not be obligated to take any action Secured Party deems
necessary or desirable to prevent or remedy any such default by Pledgor or
otherwise to protect the security interest of Secured Party under this
Agreement, and (b) shall have the absolute and immediate right to take
possession of the Collateral or any part thereof (to the extent Secured Party
has not previously taken possession) to such extent and as often as the Secured
Party, in its sole discretion, deems necessary or desirable in order to prevent
or to cure any such default by Pledgor, or otherwise to protect the security of
this Agreement. Secured Party may advance or expend such sums of money for the
account of Pledgor as Secured Party in its sole discretion deems necessary for
any such purpose.

         4.8 Secured Party's Expenses. All reasonable advances, costs, expenses,
charges and attorneys' fees which Secured Party may make, pay or incur under any
provision of this Agreement for the protection of its security or for the
enforcement of any of its rights hereunder, or in foreclosure proceedings
commenced and subsequently abandoned, or in any dispute or litigation in which
Secured Party or the holder of any of the Secured Obligations may become
involved by reason of or arising out of the Note or other Secured Obligations or
the Collateral shall be a part of the Secured Obligations and shall bear
interest until paid at the rate chargeable on the Note but not to exceed the
maximum rate of interest permitted by applicable law, from the date of such
payment until repaid by Pledgor.

         4.9 No Waiver. In case Secured Party shall have proceeded to enforce
any right or remedy hereunder and such proceedings shall have been discontinued
or abandoned for any reason, then in every such case, Pledgor and Secured Party
shall be restored to their former positions and rights hereunder with respect to
the Collateral, and all rights, remedies and powers of Secured Party shall
continue as if no such proceeding had been taken. No failure or delay on the
part of Secured Party in exercising any right, remedy or power under this
Agreement or in giving or insisting upon strict performance by Pledgor hereunder
or in giving notice hereunder shall operate as a waiver of the same or any other
power or right, and no single or partial exercise of any such power or right
shall preclude any other or further exercise thereof or the exercise of any
other such power or right. Secured Party, notwithstanding any such failure,
shall have the right thereafter to insist upon the strict performance by Pledgor
of any and all of the terms and provisions of this Agreement to be performed by
the Pledgor. The collection and application of proceeds, the entering and taking
possession of the Collateral, and the exercise of the rights of Secured Party
contained in this Agreement, shall not cure or waive any default, or affect any
notice of default, or invalidate any acts done pursuant to such notice. No
waiver by Secured Party of any breach or default of or by any party hereunder
shall be deemed to alter or affect Secured Party's rights hereunder with respect
to any prior or subsequent default.

         4.10 Remedies. No right or remedy herein reserved to Secured Party is
intended to be exclusive of any other right or remedy, but each and every such
remedy shall be cumulative, not in lieu of, but in addition to any other rights
or remedies given under this Agreement and all other security documents. Any and
all of Secured Party's rights and remedies may be exercised from time to time
and as often as such exercise as deemed necessary or desirable by Secured Party.

                                       5
<PAGE>

         4.11 Right of Secured Party to Extend Time of Payment, Substitute,
Release Security, Etc. Without affecting the liability of any person, including
Pledgor, for the payment of any of the Secured Obligations or the lien of this
Agreement on the Collateral, or the remainder thereof, for the full amount of
any indebtedness unpaid, Secured Party may from time to time, without notice or
without affecting or impairing any of Secured Party's rights under this
Agreement: (a) release any person liable for the payment of any of such
indebtedness, (b) extend the time or otherwise alter the terms of payment of any
of such indebtedness, (c) accept additional security therefor of any kind,
including deeds of trust or mortgages, (d) alter, substitute or release any
property securing the Secured Obligations, (e) resort for the payment of all or
any portion of the Secured Obligations to its several securities therefor in
such order and manner as it may deem fit, or (f) join in any subordination or
other agreement affecting this Agreement or the lien or charge thereof.

         4.12 Dividends. Upon the occurrence of an Event of Default, Secured
Party shall be entitled to any dividends, fees, receipts, payments or other
disbursements, attributable in any way to the Collateral. Pledgor shall take all
actions necessary to cause the payor of such disbursements to make such
disbursements directly to Secured Party on account of Pledgor. Such amounts,
when received by Pledgor, will be applied to the outstanding balance of the Note
or the other Secured Obligations, as determined by Secured Party. At all times
during the term of this Agreement, Secured Party will be entitled to all stock
dividends and proceeds of the Collateral.

         4.13 Delivery of Certificates. Simultaneously with the execution of
this Agreement, Pledgor shall deliver to Secured Party all certificates or other
documentation evidencing the Collateral, along with such endorsements or stock
powers as the Secured Party may request. In the event that Pledgor receives any
certificates evidencing the Collateral, Pledgor shall within three days of
receipt, deliver such certificates to Secured Party along with appropriate stock
powers executed in blank.

                                       V.
                                 MISCELLANEOUS

         5.1 Terms Commercially Reasonable. The terms of this Agreement shall be
deemed commercially reasonable within the meaning of the Uniform Commercial Code
in effect and applicable hereto.

         5.2 Notices. Any notices or demands required or permitted to be given
hereunder shall be deemed sufficiently given if in writing and personally
delivered or mailed by registered or certified mail, return receipt requested
(with all postage and charges prepaid), addressed as follows:

               To Secured Party:   At such address as provided to
                                   Pledgor in writing from time to time.

                                       6
<PAGE>

               Pledgor:            Ted Johnson
                                   15 Prestige Circle
                                   Allen, Texas  75002

or at such other address as the above parties may from time to time designate by
written notice to the other given in accordance with this Section 5.2. Any such
notice, if personally delivered shall be deemed to have been given on the date
so delivered or, if mailed, be deemed to have been given on the third day after
such notice is placed in the United States mail in accordance with this Section
5.2.

         5.3 Definitions. The terms "advances," costs," and "expenses " shall
include, but shall not be limited to, attorneys' fees whenever incurred. The
terms "indebtedness" and "obligations" shall mean and include, but shall not be
limited to, all claims, demands, obligations and liabilities whatsoever, however
arising, whether owing by Pledgor individually or as a joint venturer, or
jointly or in common with any other party, and whether absolute or contingent,
and whether owing by Pledgor as principal debtor or as accommodation maker or as
endorser, liquidated or unliquidated, and whenever contracted, accrued or
payable. In this Agreement, whenever the context so requires, the neuter gender
includes the masculine and feminine, and the singular number includes the plural
and vice versa.

         5.4 Change, Amendment, Etc. No change, amendment, modification,
cancellation or discharge of any provision of this Agreement shall be valid
unless consented to in writing by Secured Party.

         5.5 Assignment of Secured Party's Interest. Secured Party shall have
the right to assign all or any portion of its rights in this Agreement to any
subsequent holder of the Note or other instrument evidencing the Secured
Obligations.

         5.6 Parties in Interest. As and when used herein, the term "Pledgor"
shall mean and include the Pledgor herein named and its successors and permitted
assigns, and the term "Secured Party" shall mean and include the Secured Party
herein named and its successors and assigns, and all covenants and agreements
herein shall be binding upon and inure to the benefit of Pledgor, Secured Party
and their respective successors and permitted assigns.

         5.7 Applicable Law. This Agreement shall be construed, interpreted and
enforceable under and pursuant to the laws of the State of Delaware. If any
provision of this Agreement is held to be invalid or unenforceable, the validity
or enforceability of the other provisions of this Agreement shall remain
unaffected.

         5.8 Counterparts. This Agreement may be executed in two or more
counterparts, each of which shall be deemed to be an original, but all of which
shall constitute one and the same instrument, and in making proof of this
Agreement it shall not be necessary to produce or account for more than one such
counterpart.

                                       7
<PAGE>

         IN WITNESS WHEREOF, Pledgor and Secured Party have executed these
presents on the day and year first above written.

                                  PLEDGOR:

                                  ---------------------------------------------
                                  Ted Johnson

                                  SECURED PARTY:

                                  BOUNDLESS MOTOR SPORTS RACING, INC.

                                  By:
                                     ------------------------------------------

                                  Its:
                                      -----------------------------------------

                                       8

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