Wehrli Custom Fab 2in 11GA Stainless Steel Up Pipe Kit for 2017-2025 Chevy/GMC (6.6L) WCF100624

Fits select 2017-2025 Chevrolet Silverado and GMC Sierra 2500 HD/3500 HD, plus 2019-2025 4500/5500/6500 Medium Duty trucks (6.6L L5P Duramax).

The Wehrli Custom Fabrication (WCFab) 2" Stainless Steel Up Pipe Kit is a heavy-duty solution for the restrictive and leak-prone factory components. Replacing the lightweight 16-gauge, 1 5/8" OEM pipes, this kit utilizes 11-gauge 2-inch stainless steel tubing to provide a 26% increase in flow. This improved efficiency results in faster turbo spool-up and lower exhaust gas temperatures (EGTs) under load.

Built for durability, these pipes feature heavy-duty stainless steel bellows that resist the cracking common with factory units. This is a direct bolt-on kit that requires no ECM tuning and remains compatible with factory exhaust manifolds or WCFab Billet Exhaust Manifolds (WCF100373).

• Construction: Fully TIG-welded 11-gauge stainless steel
• Diameter: 2.0" (Upgraded from 1.625" OEM)
• Flow Rating: 26% better than OEM
• Bellows: High-duty stainless steel
• Installation: Bolt-on, no tuning or modifications required
• Included Hardware: Driver and passenger side up pipes, (4) Up pipe gaskets
• Manufacturer Part Number: WCF100624
• Origin: Made in USA

Replaces GM Part Numbers: 12688021, 12702943, 12681437, 12680270, 12681162, 12674813, 12676611.