Wehrli 01-04.5 Chevrolet 6.6L LB7 Duramax S400 Turbo Install Kit (No Turbo) - Illusion Purple

Wehrli Custom Fabrication is well-known for building robust parts for Duramax diesels, and this S400 turbo install kit for your 2001-2004 Chevrolet Silverado 2500 HD or 3500 with the 6.6L LB7 engine is a prime example. This kit is designed to help you swap out your factory IHI-style turbo for a larger frame Borg Warner S400 turbocharger, opening up significant performance potential. It’s a comprehensive package that addresses all the plumbing and intake modifications needed for this popular upgrade.

You'll get a substantial upgrade to your air intake system, featuring a 5-inch fabricated aluminum intake with a heavy-duty sheet metal air box and a high-performance dry filter, complete with a pre-filter cover. The intercooler hot and cold side charge pipes are also updated to 3-inch diameter, mandrel-bent aluminum tubing for better airflow. A key component is the upgraded 3-inch fabricated billet Y-bridge, which replaces the restrictive stock upper intake manifold to help maximize horsepower and efficiency. The kit includes high-quality stainless steel braided oil lines, with the feed line routing directly from the engine block's main oil galley. The turbo mounts to a T4 fabricated steel pedestal with a spacer, and the kit includes 2-inch high-flow stainless steel up-pipes. The downpipe is high-temperature ceramic coated and connects directly to your existing exhaust system's V-band clamp, meaning no cutting or modifications are needed for your exhaust. This kit also includes a driver-side transmission dipstick tube to make installing the downpipe easier.

This kit comes in a striking Illusion Purple powder coat finish. While the turbocharger itself is sold separately, this kit provides all the necessary components to make the transition to a larger S400 turbo smooth and effective. It includes silicone boots, stainless steel T-bolt clamps, V-band clamps, heat wrap, and the dipstick relocation tube.