2017-2026 Duramax 3.5" Downpipe (WCF100129)

Replace the restrictive crushed factory downpipe on your 2017-2025 L5P Duramax with this 3.5" Downpipe for improved exhaust flow. Black Ceramic Coated and heat-wrapped for thermal protection. Downpipe includes bungs for sensors and NO tuning is required to use this downpipe.

Part Number: WCF100129

• 3.5" Downpipe
  
• Ceramic Coated
  
• Heat Wrap Pre-installed
  
• NO TUNING REQUIRED

• WCFab piping kits and emissions-compliant tuning are recommended for optimum performance gains.
• Connects to the DOC (Diesel Oxidation Catalyst) outlet flange and mates with OEM exhaust system front pipe with the 4 bolt style flange connection.
• Replaces the following GM Part Numbers: 12671086

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