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    Wehrli

    Wehrli 17-26 L5P Duramax 6.6L High Flow Y-Bridge Kit - Gloss Black

    Wehrli 17-26 L5P Duramax 6.6L High Flow Y-Bridge Kit - Gloss Black

    $1,175.99 USD
    $1,195.00 USD $1,175.99 USD
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    Shipping & returns

    Shipping is calculated at checkout by size and destination. Most in-stock gear ships within a few business days; large freight items (campers, racks, bumpers) are made to order. Wrong fitment? Send it back within 30 days — we'll help you find the part that does fit.

    Fitment & build help

    Not sure if this fits your platform? Tell us your year, make, model, and trim — we'll confirm before you order. For bigger builds, we'll help you plan the full stack.

    Warranty

    Every product on this site ships through authorized channels with full manufacturer warranty. If something breaks in normal use, we'll help you get it resolved.

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    Take the performance of your 6.6L L5P Duramax diesel engine equipped 2017-2026 Chevy Silverado / GMC Sierra 2500/3500 HD truck to the next level with this High Flow Y-Bridge Kit from Wehrli Custom Fabrication. This upper intake manifold represents the culmination of our years of R&D experience pushing this GM platform to its limits- engineered to maximize airflow, improve efficiency and support everything from stock trucks to high-horsepower builds while addressing critical weak points. This kit provides an emissions compatible, Made in USA part delivering 33% More Air Flow than OEM and requiring no additional tuning for installation.  Additional benefits include evenly distributed charged air to both engine cylinder heads and specially designed ports to help protect the engine MAP sensor(s) from harmful oil and soot buildup. The results are improved throttle response, quicker turbo spool-up, lower exhaust gas temperatures (EGTs) while towing, and increased overall engine efficiency in a package that provides the high level of fit and finish customers have come to expect from WCFab. Pair it with custom performance tuning and upgraded turbochargers to unlock the additional overhead needed to reach peak horsepower levels that simply cannot be achieved with a stock y bridge assembly.

    This Part Fits:

    Year Make Model Submodel
    2021-2026 Chevrolet Silverado 2500 HD Custom
    2017-2026 Chevrolet Silverado 2500 HD High Country
    2017-2026 Chevrolet Silverado 2500 HD LT
    2017-2026 Chevrolet Silverado 2500 HD LTZ
    2017-2026 Chevrolet Silverado 2500 HD WT
    2024-2026 Chevrolet Silverado 2500 HD ZR2
    2017-2026 Chevrolet Silverado 3500 HD High Country
    2017-2026 Chevrolet Silverado 3500 HD LT
    2017-2026 Chevrolet Silverado 3500 HD LTZ
    2017-2026 Chevrolet Silverado 3500 HD WT
    2020-2026 GMC Sierra 2500 HD AT4
    2024-2026 GMC Sierra 2500 HD AT4X
    2017-2021 GMC Sierra 2500 HD Base
    2017-2026 GMC Sierra 2500 HD Denali
    2024-2026 GMC Sierra 2500 HD Denali Ultimate
    2022-2026 GMC Sierra 2500 HD Pro
    2017-2026 GMC Sierra 2500 HD SLE
    2017-2026 GMC Sierra 2500 HD SLT
    2020-2026 GMC Sierra 3500 HD AT4
    2017-2021 GMC Sierra 3500 HD Base
    2017-2026 GMC Sierra 3500 HD Denali
    2024-2026 GMC Sierra 3500 HD Denali Ultimate
    2022-2026 GMC Sierra 3500 HD Pro
    2017-2026 GMC Sierra 3500 HD SLE
    2017-2026 GMC Sierra 3500 HD SLT

    • Ships from San Diego

      We ship from our San Diego dealer network. Most in-stock gear goes out within a few business days — shipping's calculated at checkout by size and destination.

    • Wrong fitment? We make it right.

      If a part doesn't fit your platform the way it should, send it back. We handle the return and find you the part that does.

    • Authorized dealer support

      Every product moves through proper channels. Full manufacturer warranty, real tech support — no gray-market headaches.