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SKU: S6012409 MBRP 4 inch XP Series CAT Back Kit for GM Duramax 2006-2007 6.6L (T409)


    • Image 1: MBRP 4 inch XP Series CAT Back Kit for GM Duramax 2006-2007 6.6L (T409)
    Purchase MBRP 4 inch XP Series CAT Back Kit for GM Duramax 2006-2007 6.6L (T409)

    • SKU: S6012409 MBRP 4 inch XP Series CAT Back Kit for GM Duramax 2006-2007 6.6L (T409)

    • $654.99

    • As low as $60/mo or 0% APR with . Check your purchasing power


    MBRP 4" XP Series Cat Back Single Exhaust System Kit for GM Duramax 6.6L(T409)

    MBRP designs their products with the phrase, "The best system starts with the best materials" in mind. This XP Series Cat Back Exhaust System Kit is made from T409 steel offering a value price without compromising the quality. Plus, the MBRP XP Series Cat back exhausts come with a Lifetime Warranty.

    Improving the Performance of Your 6.6L Duramax Engine

    Upgrading your diesel truck's stock exhaust to an MBRP performance exhaust can add up to 18 horsepower with 28 ft/lb more torque. The 4" T409, mandrel bent tubing used for this system opens up the flow path allowing your engine to remove the hot air fast. The spiral-louvered high flow muffler was specifically designed to give your 6.6L Duramax truck a rich, mellow sound.

    Built for Easy Installation

    Using all the factory mounts and OEM hangers, the XP Series Cat Back Single Exhaust System kit is a bolt-on exhaust unit. The estimated project time is 1.5-2 hours and that includes removing your stock exhaust. This kit is designed to fit any 2006 and 2007 GMC Sierra or Chevy Silverado 2500/3500 with a 6.6L GM Duramax engine. MBRP includes all the clamps and parts you need for easy installation whether your diesel truck has a Crew Cab, Extended Cab, short or long bed.

    Shipping Information

    • Item Requires Shipping
    • 56.00 lbs.
    • W16" x H10" x L60"

    Reviews / Q&A

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    June 9, 2025 by Michael O. (NM, US)
    “Very easy to get the order completed, easy to install and looks great.”
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    June 7, 2025 by Joseph H. (WA, US)
    “Very convenient, multiple ways of paying, thank you!”
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    June 7, 2025 by Martin C. (NV, US)
    “Fast and easy”