Chevrolet Silverado 3500 Turbo Swap Kit – Wehrli S400 Single Turbo Install, Bengal Silver, for 2001–2004 Duramax LB7. A complete big-single conversion to replace the stock IHI turbo and upgrade airflow front to back.

This kit updates the intake, charge pipes, and upper intake tract while providing robust mounting and oiling for an S400. The ceramic-coated downpipe mates to the factory front pipe, and the kit includes clamps, boots, and hardware. Finished in Bengal Silver powder coat. Forward-facing thermostat housing WCF100405 is required on LB7. S400 turbocharger not included; Half Marmon outlet only (HX40 not compatible). If supplying your own turbo, provide details for fitment; mock-up may be required.

Features

• 5" fabricated aluminum intake with air box, dry filter, and pre-filter
• 3" mandrel-bent 14-gauge aluminum hot/cold-side charge pipes
• 3" high-flow fabricated Y-bridge and cold-side pipe
• T4 pedestal with spacer; stainless braided oil feed/drain lines
• Ceramic-coated 3" downpipe; retains factory V-band connection
• Hardware pack: silicone boots, T-bolts, V-bands, heat wrap, and dipstick tube

Questions or planning an install? Call our Austin or Los Angeles area teams—we offer professional installation and customization at both locations: 512-982-9393 (TX) or 562-981-6800 (CA).

Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov