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

If you're looking to swap your stock turbo for a larger Borg Warner S400 frame turbo on your 2001-2004 Chevrolet Silverado 2500 HD or 3500 with the 6.6L LB7 Duramax engine, this install kit from Wehrli Custom Fabrication is what you need. This kit is designed to make that transition smoother, providing the necessary components to adapt your truck to a bigger, more powerful turbo setup without needing to cut or modify your exhaust system. It includes everything from the intake plumbing to the oil lines, all finished in a gloss white powder coat for a clean look under the hood.

This kit focuses on improving airflow throughout the induction system. You get a new 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 hot and cold side intercooler pipes are 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 stock upper intake manifold to help your engine breathe easier and achieve better horsepower and efficiency. The oil feed and drain lines are made from high-quality stainless steel braided Parker lines, with the feed routing directly from the engine block's main oil galley.

The kit includes a T4 fabricated steel pedestal and spacer, designed to mount popular S400-style turbos (sold separately). It also comes with 2-inch high-flow stainless steel up-pipes and a high-temperature ceramic-coated turbo downpipe that uses a V-band clamp to connect to your existing exhaust front pipe, simplifying installation. For easier downpipe installation, a driver-side transmission dipstick tube relocation is included. All the necessary silicone boots, stainless steel T-bolt clamps, V-band clamps, and heat wrap are also part of this comprehensive package, ensuring a solid installation.