**Exhibit 32.1**

**UNIVERSALCOMPRESSION PARTNERS, L.P.**

**CERTIFICATIONPURSUANT TO**

**18U.S.C. SECTION 1350,**

**ASADOPTED PURSUANT TO**

**SECTION 906 OF THE SARBANES-OXLEY ACTOF 2002**

In connection withthe Quarterly Report* of Universal Compression Partners, L.P. (the “Company”)on Form 10-Q for the period ending June 30, 2007 (the “Report”), I, Stephen A.Snider, Chief Executive Officer of the general partner of the Company’s generalpartner, UCO GP, LLC, certify, pursuant to 18 U.S.C. § 1350, as adoptedpursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:
| (1)    | The Report fully complies with the requirements of  Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and                                 |
|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                                                                                                                                   |
| (2)    | The information contained in the Report fairly  presents, in all material respects, the financial condition and results of  operations of the Company. |

 
| /s/ STEPHEN A. SNIDER                                       |   |
|-------------------------------------------------------------|--------|
| Stephen A. Snider                                           |   |
| Chief Executive Officer, UCO GP, LLC                        |   |
| As General  Partner of UCO General Partner, LP              |
| As General  Partner of Universal Compression Partners, L.P. |
|                                                             |        |  |  |

 

August 7, 2007

In connection withthe Quarterly Report* of Universal Compression Partners, L.P. (the “Company”)on Form 10-Q for the period ending June 30, 2007 (the “Report”), I, Daniel K.Schlanger, Chief Financial Officer of the general partner of the Company’sgeneral partner, UCO GP, LLC, certify, pursuant to 18 U.S.C. § 1350, as adoptedpursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

(1)               The Report fullycomplies with the requirements of Section 13(a) or 15(d) of the SecuritiesExchange Act of 1934; and

(2)               The informationcontained in the Report fairly presents, in all material respects, thefinancial condition and results of operations of the Company.
| /s/ DANIEL K. SCHLANGER                                     |   |
|-------------------------------------------------------------|--------|
| Daniel K. Schlanger                                         |   |
| Chief Financial Officer, UCO GP, LLC                        |   |
| As General  Partner of UCO General Partner, LP              |
| As General  Partner of Universal Compression Partners, L.P. |
|                                                             |        |  |  |

 

August 7, 2007

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*          This report presents the financial condition,results of operations and cash flows of the registrant and the results ofoperations and cash flow of the registrant’s predecessor, the natural gascontract compression business that is provided in the United States of Americaby Universal Compression Holdings, Inc. and its subsidiaries.

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