Fits: 2017 thru 2024 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