Supplemental Indenture, dated as of May 27, 2010



 EXHIBIT 4.1 

SUPPLEMENTAL INDENTURE 

SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”) dated as of May 27, 2010, among COOPER-STANDARD AUTOMOTIVE
INC., an Ohio corporation (the “New Company”), COOPER-STANDARD HOLDINGS INC., a Delaware corporation (the “Parent Guarantor”), the subsidiaries of the New Company set forth on the signature page hereto (together
with the Parent Guarantor, the “Guarantors”) and U.S. BANK NATIONAL ASSOCIATION, a national banking association, as trustee under the indenture referred to below (the “Trustee”). 

W I T N E S S E T H : 

WHEREAS CSA Escrow Corporation (the “Company”) has heretofore executed and delivered to the Trustee
an indenture (as amended, supplemented or otherwise modified, the “Indenture”) dated as of May 11, 2010, providing for the issuance of the Company’s $450,000,000 aggregate principal amount of the
8 1/2% Senior Notes due 2018 (the
“Securities”); 
 WHEREAS pursuant to Section 9.01 of the Indenture, the Trustee, the New Company
and the Guarantors are authorized to execute and deliver this Supplemental Indenture; 
 NOW THEREFORE, in consideration of the
foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the New Company, the Guarantors and the Trustee mutually covenant and agree for the equal and ratable benefit of the holders of the Securities as
follows: 
 1. Defined Terms. As used in this Supplemental Indenture, terms defined in the Indenture or in the preamble
or recital hereto are used herein as therein defined, except that the term “holders” in this Supplemental Indenture shall refer to the term “holders” as defined in the Indenture and the Trustee acting on behalf of
and for the benefit of such holders. The words “herein,” “hereof” and “hereby” and other words of similar import used in this Supplemental Indenture refer to this Supplemental Indenture as a whole
and not to any particular section hereof. 
 2. Agreement to Assume Obligations. The New Company hereby agrees to
unconditionally assume the Company’s Obligations under the Securities and the Indenture on the terms and subject to the conditions set forth in the Indenture and to be bound by all applicable provisions of the Indenture and the Securities and
to perform all of the obligations and agreements of the Company under the Indenture. 
 3. Agreement to Guarantee. The
Guarantors hereby agree, jointly and severally, with all existing guarantors (if any), to unconditionally guarantee the New Company’s Obligations under the Securities and the Indenture on the terms and subject to the conditions set forth in
Article 11 of the Indenture and to be bound by all other applicable provisions of the Indenture and the Securities and to perform all of the obligations and agreements of a guarantor under the Indenture. 

4. Notices. All notices or other communications to the New Company and the Guarantors shall be given as provided in
Section 13.02 of the Indenture. 
 5. Ratification of Indenture; Supplemental Indenture Part of Indenture. Except as
expressly amended hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all
purposes, and every holder of Securities heretofore or hereafter authenticated and delivered shall be bound hereby. 







 6. Release of Obligations of Escrow Company. Upon execution of this Supplemental
Indenture by the New Company and the Trustee, CSA Escrow Corporation is released and discharged from all obligations under the Indenture and the Securities. 

7. Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF
NEW YORK. 
 8. Trustee Makes No Representation. The Trustee makes no representation as to the validity or
sufficiency of this Supplemental Indenture. 
 9. Counterparts. The parties may sign any number of copies of this
Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. 
 10.
Effect of Headings. The Section headings herein are for convenience only and shall not effect the construction thereof. 







 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly
executed as of the date first above written. 
  

					
	COOPER-STANDARD AUTOMOTIVE INC.
		
	By:	 	 /s/ Timothy W. Hefferon

		 	Name:	 	Timothy W. Hefferon
		 	Title:	 	Vice President, General Counsel & Secretary
	
	COOPER-STANDARD HOLDINGS INC.
		
	By:	 	 /s/ Timothy W. Hefferon

		 	Name:	 	Timothy W. Hefferon
		 	Title:	 	Vice President, General Counsel & Secretary
	
	GUARANTORS:
	
	COOPER-STANDARD AUTOMOTIVE FHS INC.
	
	 COOPER-STANDARD AUTOMOTIVE FLUID SYSTEMS MEXICO HOLDINGS LLC

	
	COOPER-STANDARD AUTOMOTIVE NC L.L.C.
	
	COOPER-STANDARD AUTOMOTIVE OH, LLC
	
	CSA SERVICES INC.
	
	NISCO HOLDING COMPANY
	
	NORTH AMERICAN RUBBER, INCORPORATED
	
	STANTECH, INC.
	
	STERLING INVESTMENTS COMPANY
	
	WESTBORN SERVICE CENTER, INC.
		
	By:	 	 /s/ Timothy W. Hefferon

		 	Name:	 	Timothy W. Hefferon
		 	Title:	 	Secretary










					
	TRUSTEE:
	
	U.S. BANK NATIONAL ASSOCIATION
	
	as Trustee
		
	By:	 	 /s/ James Kowalski

		 	Name:	 	James Kowalski
		 	Title:	 	Vice President


  

					
	Acknowledged by:
	
	CSA ESCROW CORPORATION
		
	By:	 	 /s/ Timothy W. Hefferon

		 	Name:	 	Timothy W. Hefferon
		 	Title:	 	Vice President