Wehrli · New
Wehrli GM Duramax LB7 S400 Single Turbo 3in Down Pipe
MPN WCF100878 · Store SKU wcfWCF100878
Supplier stock checked 11/8/2026, 3:41:06 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
LB7 Duramax 3" Down pipe for S400 turbo with 4.6" Diameter flat exhaust outlet flange (Half marmon). This down pipe mates to the exhaust system v-band flange with OEM clamp for easy install. Must be used with a T4 pedestal between 5.5-6.5" tall. Wehrli Custom Fab Down Pipe, 3in., for LB7 Duramax w S400 Single Turbo Down Pipe, 3in., for LB7 Duramax w S400 Single Turbo
Manufacturer fitment & guides
Check WCF100878 against the manufacturer’s application information below.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
Part-specific notes
- Not CARB approved. Destination and intended-use restrictions must be checked before sale.
- Emissions acknowledgement required before purchase.
- California Proposition 65: Y