Chevrolet Duramax Twin Turbo Kit - Wehrli - S400/Stock - Kiwi Green - 2001-2004. Built for LB7 trucks, this compound setup pairs an S400 atmosphere with the stock IHI to deliver strong street and tow performance in a bold Kiwi Green finish.

Capable of supporting up to 1000 RWHP depending on turbo and fuel modifications, it offers stock-like spool, improved EGT control, and headroom for future upgrades. Recommended pairings: S475/stock (up to 750 RWHP), S480/stock (800+), or S480 with a 64mm drop-in (900+), all with proper supporting mods; a WCFab 750+ built Allison is recommended at higher power. Not compatible with Banks intercoolers—contact us for options. Requires removal/relocation of the passenger-side battery. Hot/driver-side intercooler pipe sold separately (WCF100349). Turbochargers not included.

Features

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

Have questions about combinations, fitment, or ordering with a Banks charge air cooler? Call our experts at 512-982-9393 (Austin, TX) or 562-981-6800 (Los Angeles, CA area). We offer installation and customization at both locations.

Considering 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