• HSP Max Flow Replacement Up-Pipes 2001-2016 Duramax

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    Upgrade your factory up-pipes to HSP Diesel 2" max flow up-pipes to increase horsepower, torque, and efficiency. 

    2" Stainless Steel with high strength/flow bellows.

    When combined with HSP Diesel 3" downpipe they do not need to be crushed, allowing maximum flow.


    • Item #: 023-HSP
    • Manufacturer: HSP Diesel