Installation Instructions
Cat-Back Stainless Extreme Dual Exhaust
Toyota Tundra 4.6L, 4.7L, 5.7L 2/4wd
Crew Max, Short Bed 5.5’ /Double Cab, Standard 6.5’ Bed

Part #67501

ITEMA
B
CDEFGH
IJKL
M

PART
1146-700905S
1147-700906S
11240S
1150-700909S
1151-700910S
1154-700913S
1155-700914S
552-700413S
500640
5757
4267
4315
4240

QUANTITY
111
1
111228111

N

1330-701093S

1DESCRIPTION
2.5” Stainless Passenger Side Headpipe
2.5” Stainless Driver Side Headpipe
Stainless Superflow CFT Muffler
2.5” Stainless Passenger Side Extension Pipe2.5” Stainless Driver Side Extension Pipe2.5” Stainless Passenger Side Overaxle Pipe2.5” Stainless Driver Side Overaxle Pipe2.5” Stainless Exit Pipe4.0” Stainless Tip
2.5” Clamp
Rear Tailpipe Hanger
Bolt Kit for Tailpipe Hanger
Rubber Grommet

2.5 Stainless Adapter w/flange for 2009 Models

Thank you for purchasing our Gibson Exhaust System for your vehicle.
If you need further assistance, please do not hesitate to call our technical department at(800) 528 -3044 Monday through Friday, 8am to 5 pm.

Installation Instructions #67501
When installing this exhaust system make sure to use proper safety precautions. Use jack stands when working under thevehicle, set parking brake, block tires and use safety glasses and gloves. Allow exhaust to cool before attempting installation.
Severe injury or burns could occur if safety measures are not taken.
SUGGESTED TOOLS: 1/2", 9/16", 15mm wrenches & sockets, WD-40, hacksaw, jack stands
1. Disconnect the negative battery cable before removal of OEM exhaust. This will allow the computer to reset and recognize
the new exhaust. Lay out the exhaust on the floor so it looks like the drawing and compare parts with manual.

2. Remove the stock exhaustat the 2-bolt flange located in
front of the muffler. Disengage
the welded hangers from theOEM rubber grommets. Use
WD-40 to help in the process.
Do not damage or remove therubber grommets as you willreuse them to mount your newsystem. Now, unbolt thetailpipe and remove exhaust.
Do not throw away stock
flange bolts, as you will reusethem.

6. Install the passenger sideoveraxle tailpipe #F to theextension pipe. Use clamp #Jto secure. Do not tighten.
Insert welded hanger into
rubber grommet.

3. Install passenger side
headpipe #A using your stockbolts. Do not tighten. Next,
install driver side headpipe #B
using stock bolts. Do nottighten. Install metal hangers
into rubber grommets.

8. Install driver side overaxle
tailpipe #G onto extension
pipe, use clamp #J to securepipe. Do not tighten. Insert
welded hanger into rubber
grommet.

4. Install muffler #C onto
headpipes 1.5”-2” with thelouvers facing towards theconverter. Use a jack stand tosupport the muffler. Useclamps #J to secure themuffler to the headpipes. Donot tighten. Muffler inlet islooking into the louvers.
5. Install extension pipe #D
into muffler. Use clamp #J tosecure. Do not tighten. Next
install driver side extension
pipe #E into muffler using
clamp #J to secure. Do nottighten. Insert welded hanger
into rubber grommet.

7. Install rear tailpipe hanger#K. Use bolt kit #L to secure.
Use the hole on frame closest
to the rear shackle. Installrubber grommet on rearhanger.

9. Next, install the exit pipes#H. Use clamps #J to secure
the tailpipes.

10. Install stainless steel tips.
Clamp down. When you haveeverything in place, firmly
tighten all bolts and clamps
down securely. Use stainlesssteel cleaner and a Scotch
Brite pad weekly to prevent tipfrom discoloration. Inspect all
fasteners after 25-50 miles ofoperation and re-tighten asnecessary.

GIBSON EXHAUST systems are designed on a factory stock vehicle
Any aftermarket products installed could increase the sound levels of the exhaust.
Make sure there is a 1” clearance from ALL rubber brake lines, shock boots, lines, tires, etc. to prevent
heat related damage or fire.