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    Wehrli

    Wehrli 81-87 GMC/K Square Body Truck Intercooler & Radiator Kit for Duramax Swap

    Wehrli 81-87 GMC/K Square Body Truck Intercooler & Radiator Kit for Duramax Swap

    $4,200.99 USD
    $4,295.00 USD $4,200.99 USD
    Sale Sold out
    Shipping calculated at checkout.

    Available on backorder

    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.

    View full details
    The WCFab Intercooler and Radiator Kit is engineered for upgrading a classic 1981-1987 3/4 or 1 Ton GM C/K Square Body Truck(Chevy C20, C30, K30) with a 6.6L Duramax diesel engine conversion. Developed and tested on our own Duramax swapped Square Body shop truck, this kit provides a clean, proven solution for mounting a high-performance radiator and intercooler in your build. Featuring a specially modified Griffin Dual Row Aluminum Radiator with Dual 16-inch Electric Fans (2148 CFM total) and an Aluminum Shroud, along with a customized Vibrant Performance Intercooler / charge air cooler, this kit is designed to keep coolant and intake air temperatures under control on your diesel swap. The radiator inlet and outlet have been modified by our fabrication team to match the OEM Duramax specifications for ease of installation. Kit includes CAD designed, laser cut, CNC bent raw steel upper and lower core support mounting brackets ready for painted or powder coated in the color of your choice after installation.

    • 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.