Wehrli Custom Fabrication 2in Stainless Up Pipe Kit for 2001-2004 Chevrolet/GMC 2500HD/3500 (6.6L LB7)

Fits select 2001-2004 Chevrolet Silverado and GMC Sierra 2500 HD/3500 (6.6L LB7 Duramax).

Eliminate the common failure point of the factory 1-5/8 inch, 16-gauge up pipes with the Wehrli Custom Fabrication (WCFab) 2-inch Stainless Up Pipe Kit. Designed for high-performance single turbo applications and factory exhaust manifolds, these pipes are constructed from heavy-duty 11-gauge stainless steel to withstand higher temperatures and pressures. The upgraded 2-inch diameter increases turbo spool-up and helps reduce exhaust gas temperatures (EGTs) by improving flow efficiency.

This kit features heavy-duty stainless bellows engineered to resist the cracking and leaking common in OEM units. Every pipe is fully TIG-welded for maximum durability in extreme environments. Note: These up pipes are compatible only with OEM exhaust manifolds or WCFab Duramax Billet Exhaust Manifolds (WCF100363). While designed for a direct fit with WCFab downpipes, use with OEM or other aftermarket downpipes may require additional modifications.

• Heavy-duty 11-gauge stainless steel construction
• Increased 2-inch diameter for improved flow and spool-up
• Reinforced stainless steel bellows prevent common exhaust leaks
• Fully TIG-welded for superior joint strength
• Includes (4) high-quality up pipe gaskets
• Replaces GM Part Numbers: 97223167, 97302261
• Manufacturer Part Number: WCF100590
• Made in the USA