About this product
Description
3" down pipe for an S400 turbo on a 2001-2004 LB7 Duramax. It hangs off the 4.6" flat half-marmon outlet flange on the turbo and drops to the exhaust system V-band, reusing the OEM clamp, so the hot side of an S400 swap bolts together without cutting or welding.
Built for T4 pedestals between 5.5" and 6.5" tall. The pipe is high-temp coated and ships with the V-band clamp plus heat wrap and clamps.
Part Number: WCF100878
Features
- 3" down pipe for the S400 4.6" flat (half marmon) outlet flange
- Mates to the exhaust V-band with the OEM clamp
- V-band clamp, heat wrap and clamps included
- High-temperature coating
- For T4 pedestals 5.5" to 6.5" tall
- Made in USA
Notes
- Pedestal height must be between 5.5" and 6.5" for the pipe to line up.
- LLY through LML trucks use WCF100811.
Description supplied by Dirty Diesel Customs through its current Shopify listing. Product, performance, and health claims are the seller’s and have not been independently verified by StorkScout.






