Wehrli 2001-2004 LB7 Duramax S400 Single Turbo Install Kit Candy Teal

If you're looking to upgrade your 2001-2004 Chevrolet Silverado 2500 HD or 3500 with the LB7 6.6L Duramax engine, this S400 single turbo install kit from Wehrli Custom Fabrication is designed to help you swap out the stock IHI-style turbo for a larger Borg Warner S400 frame turbo. This kit is built to handle increased airflow demands, making it a solid choice for those seeking more power and efficiency from their diesel engine.

This kit includes a robust 5-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 hot and cold side charge pipes have been upgraded to 3-inch diameter, mandrel-bent aluminum tubing for better flow. A key component is the upgraded 3-inch fabricated billet Y-bridge, which replaces the restrictive factory upper intake manifold to maximize horsepower and efficiency. The oil feed line is routed from the main oil galley using high-quality stainless steel braided Parker lines, and the kit comes with a T4 fabricated steel pedestal and spacer. The included high-temperature ceramic-coated turbo downpipe connects directly to your existing exhaust front pipe V-band clamp, meaning no cutting or modifications are needed for your exhaust system. This kit also includes a driver-side transmission dipstick tube to make installing the downpipe easier.

The kit comes complete with silicone boots, stainless steel T-bolt clamps, V-band clamps, and heat wrap. It's important to note that this kit is not CARB approved and cannot be shipped to California. If you are not purchasing a genuine Borg Warner turbo directly from Wehrli, you will need to provide the specific brand and details of the turbo you plan to use so they can ensure proper fitment for your kit. The order lead time begins once Wehrli has the necessary turbo in their possession for mock-up and fabrication.