Description
Fits: 2017 thru 2025 Chevy Silverado/GMC Sierra 2500HD/3500HD L5P Duramax Diesel
Replace the restrictive crushed factory downpipe with this Wehrli Custom Fabrication 3.5″ Downpipe for improved exhaust flow.
*THE MANUFACTURE, SALE, OFFER FOR SALE, OR INSTALLATION OF THIS PRODUCT IS NOT LEGAL IN CALIFORNIA.*
Features:
- Fabricated Steel construction
- High-temp Black Ceramic Coat Finish
- Catalyst back, emissions compliant
- Includes bungs for sensors
- No tuning required
- Made in the USA
Includes:
- 3.5″ Steel Down Pipe
- Heat wrap pre-installed
Notes:
- Connects to the DOC (Diesel Oxidation Catalyst) outlet flange and mates with OEM exhaust system front pipe with the 4 bolt style flange connection
- WCFab piping kits and emissions-compliant tuning recommended for optimum performance gains
- 3-5 business day processing time before shipment
Replaces Part #:
- GM 12671086
