Wehrli 01-04 Chevrolet 6.6L LB7 Duramax S300 Turbo Install Kit (No Turbo) - WCFab Red

If you're looking to upgrade the turbo on your 2001-2004 Chevrolet Silverado 2500 HD with the 6.6L LB7 Duramax engine, this S300 turbo install kit from Wehrli is what you need to make the switch from your stock IHI turbo. This kit is designed to adapt your truck to a larger frame Borg Warner S300 style turbocharger, opening up possibilities for significant horsepower and efficiency gains. It replaces restrictive factory components with well-built aluminum piping and a fabricated Y-bridge, ensuring your engine can breathe easier.

This kit includes a robust 4-inch fabricated aluminum intake system with a heavy-duty sheet metal air box and a high-performance dry filter, complete with a pre-filter cover. The intercooler plumbing is upgraded to 3-inch diameter mandrel-bent aluminum tubing for improved airflow. A key component is the 3-inch fabricated billet Y-bridge, which replaces the stock upper intake manifold to optimize air delivery to the engine. High-quality stainless steel braided Parker oil lines are included, with the feed line routing directly from the engine block's main oil galley. The kit also features a T4 fabricated steel pedestal designed to mount popular turbo sizes (sold separately) and integrates with 2-inch high-flow stainless steel up-pipes. The included high-temperature ceramic-coated turbo downpipe connects directly to your existing exhaust front pipe via a V-band clamp, meaning no cutting or modifications are needed for your exhaust system. For easier installation of the downpipe, a driver-side transmission dipstick tube relocation is also provided.

This kit is finished with a custom red powder coat for a clean look. While the turbocharger itself is sold separately, this kit provides all the necessary plumbing, intake, Y-bridge, oil lines, and mounting hardware to complete the turbo swap. If you're not purchasing a Borg Warner turbo from Wehrli, be sure to provide the details of your chosen turbo so they can ensure proper fitment. Note that this kit is not CARB approved and cannot be shipped to California.