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Wehrli GM Duramax LB7 S400 Single Turbo 3in Down Pipe

Wehrli · New

Wehrli GM Duramax LB7 S400 Single Turbo 3in Down Pipe

MPN WCF100878 · Store SKU wcfWCF100878

$259.00
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Supplier stock checked 11/8/2026, 3:41:06 AM UTC. Adding a part does not reserve it.

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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
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