Wehrli · New

Wehrli 17-24 Chevrolet/GMC 6.6L L5P Duramax 3.5in Down Pipe

Name: Wehrli 17-24 Chevrolet/GMC 6.6L L5P Duramax 3.5in Down Pipe
Brand: Wehrli
SKU: wcfWCF100129
Price: 345.00 USD

MPN WCF100129 · Store SKU wcfWCF100129

$345.00

IN STOCK8 ready to ship

Supplier stock checked 11/7/2026, 11:10:24 AM UTC. Adding a part does not reserve it.

30-day returns for unopened, unused new parts

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

Replace the restrictive crushed factory down pipe on your 2017-2025 L5P Duramax with this 3.5" Down Pipe for improved exhaust flow. Connects to the DOC outlet flange behind the OEM turbo and mates with OEM exhaust system front pipe with the 4 bolt style flange connection. Black Ceramic Coated and Heat wrapped. Down Pipe includes bungs for sensors and NO tuning required to use this down pipe. WCFab piping kits and emissions compliant tuning recommended for optimum performance gains. Wehrli Custom Fab Down Pipe, 3.5in., for 2017-2025 Duramax L5P Down Pipe, 3.5in., for 2017-2025 Duramax L5P

Manufacturer fitment & guides

Check WCF100129 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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Add your exact parts and delivery details, then continue to payment. Eligible orders show the final parts, shipping and tax total and a PayPal button here after automatic checks. Freight, oversized, custom and uncertain items go to JuiceBuilt for a quote. You are charged only after approving PayPal; supplier orders are submitted separately after verified payment.

Does a part number guarantee vehicle fitment?

No. Product descriptions are supplied by the manufacturer. Check the manufacturer application information for your exact vehicle, engine and supporting modifications. Online checkout requires your exact-part fitment acknowledgment. Contact JuiceBuilt before ordering if you need fitment help.

Is the stock shown reserved for me?

No. Availability is a dated supplier snapshot. Inventory can change, and adding a part to your build does not reserve it. Availability and delivery are checked again before payment. A supplier order is confirmed separately after payment.

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Shipping for orders below $100 is quoted in your reviewed estimate before payment.

Online checkout is initially available for US delivery addresses. For other countries, contact JuiceBuilt for a manual quote before payment.

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What is the return policy?

Request a return within 30 calendar days after delivery. New parts must be unopened and unused.

The customer pays return shipping for a change-of-mind return.

Any actual supplier restocking charge is disclosed before purchase.

Clearance and scratch-and-dent parts are final sale. No returns or refunds.

Read the full shipping & returns policy ↗

This policy does not limit rights required by law.

Wehrli 17-24 Chevrolet/GMC 6.6L L5P Duramax 3.5in Down Pipe

Product details

Manufacturer fitment & guides

Part-specific notes

THE NEXT PART
OF YOUR BUILD.

Free shipping on $100+ orders.

Build with the right brands.

Find your next upgrade.

Make the whole setup work.

A few things to know.

Your build.

Delivery & checkout

Delivery address