Chevrolet Silverado 2500 HD Turbo Swap Kit – Wehrli S400 – Sparkle Copper – 01-04. Swap your 2001–2004 6.6L LB7 from the stock IHI to an S400-based setup.

WCFab engineered this kit to replace the LB7’s stock IHI with an S400 layout. It adds a 5" intake, 3" mandrel-bent charge pipes, and a billet y-bridge for higher flow. A T4 pedestal with spacer accepts popular S400 turbos (sizes sold separately). The 3" ceramic coated downpipe connects to the OEM front pipe V-band—no cutting. Requires WCFab forward-facing thermostat housing (WCF100405) on LB7. Downpipe fits Half Marmon S400 outlet (4.6"), not HX40.

Features

• 5" fabricated aluminum intake with sheet-metal air box and dry filter
• 3" 14-gauge mandrel-bent hot/cold intercooler piping
• 3" high-flow billet y-bridge
• T4 pedestal with spacer; stainless braided oil lines
• 3" ceramic coated downpipe; V-band to OEM front pipe

Questions or need fitment guidance? Call us. We offer installation and customization in Austin, TX and the Los Angeles, CA area: 512-982-9393 (TX), 562-981-6800 (CA).

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

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