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

If you're looking to upgrade the turbo on your 2001-2004 Chevrolet Silverado 2500 HD or 3500 with the 6.6L LB7 Duramax engine, this S300 turbo install kit from Wehrli Custom Fabrication is designed to get you there. This kit allows you to swap your factory IHI-style turbo for a larger BorgWarner S300 frame turbo, significantly improving your engine's ability to breathe and unlock more power and efficiency. It's a comprehensive package that replaces many of the restrictive stock components with high-flow alternatives.

Wehrli has engineered this kit with performance and ease of installation in mind. You get a new 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 hot and cold side charge pipes are 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 stock manifold to further enhance air delivery to the engine. The kit also includes high-quality stainless steel braided oil feed and drain lines, routing directly from the engine block. The turbo mounts to a T4 fabricated steel pedestal, and the included high-temperature ceramic-coated downpipe connects directly to your existing exhaust system's V-band clamp, meaning no cutting or modifications are needed for your exhaust.

This kit comes with everything you need for the turbo swap itself, including silicone boots, stainless steel T-bolt clamps, V-band clamps, and heat wrap. It also features a driver-side transmission dipstick relocation tube to make installing the downpipe much easier. While the turbocharger itself is sold separately, this kit provides the foundation for a robust S300 turbo upgrade. The piping is finished in a gloss black powder coat for a clean look under the hood.