Chevrolet Silverado 3500 Turbocharger Kit - Wehrli - S400/Stock - Brizzle Blue - 01–04. This compound-turbo hardware pairs an S400 atmosphere with the stock IHI for LB7 Duramax trucks, offering strong power potential with responsive, stock-like spool and improved EGT control.

Made in the USA and finished in Brizzle Blue, the Wehrli S400/Stock twin kit is built for 2001–2004 Silverado 3500 LB7 applications. Ideal for daily-driven work and tow rigs seeking efficiency and room to grow. Turbos are not included; common setups with supporting fuel/trans mods: S475/stock (up to ~750 RWHP, quick spool), S480/stock (800+ RWHP), S480/64mm drop-in (900+ RWHP). Not compatible with Banks intercoolers without additional parts (contact us). Requires removal/relocation of the passenger-side battery. Driver-side intercooler pipe sold separately (WCF100349).

Features

• 3" one-piece Y-bridge with HD bead roll
• 4" ceramic-coated turbo downpipe
• 5" intake, dry filter, Outerwears pre-filter
• S400 pedestal with built-in oil return
• 3.5" cold-side charge pipe and 3.5" turbo inlet horn
• Stainless oil feed/drain lines and fittings
• Coolant overflow tank with hoses, fittings, low-coolant sensor
• Silicone boots, T-bolt/V-band clamps, heat wrap
• Durable powder coat finish

Have questions or need a tailored parts list? Call our Austin shop at 512-982-9393 or our Los Angeles area shop at 562-981-6800. We offer professional installation and customization at both locations.

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

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