GMC Duramax LB7 Twin Turbo Kit - Wehrli - S400/Stock - Bengal Grey (2001-2004). This compound pairs an S400 atmosphere with the stock IHI for strong power potential, quick spool, and improved EGT control.

Built for headroom with daily usability. Pairings: S475/stock ~750 RWHP, S480/stock 800+ RWHP, S480/64mm 900+ RWHP—each with supporting fuel and trans upgrades. Turbochargers not included. Requires removal/relocation of the passenger-side battery. Not compatible with Banks intercoolers; contact us for options. Hot/driver-side intercooler pipe sold separately (WCF100349).

Features

• 5 in. intake with dry filter and pre-filter
• 3 in. one-piece Y-bridge; 3.5 in. cold-side pipe
• 4 in. ceramic-coated downpipe; stainless oil lines
• Coolant overflow tank with low-coolant sensor
• Silicone boots, T-bolt/V-band clamps, heat wrap
• Bengal Grey powder coat; Made in USA

Questions? Call our Austin shop at 512-982-9393 or our Los Angeles-area shop at 562-981-6800. We offer installation and customization at both locations.

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

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