Wehrli WCFab 2" Stainless Driver Side Up Pipe for 2001-2016 Chevrolet/GMC (6.6L) WCF100652

Fits 2001-2016 Chevrolet Silverado and GMC Sierra 2500 HD/3500 (6.6L Duramax LB7, LLY, LBZ, LMM, and LML).

Replace the thin, failure-prone 16-gauge factory driver-side up pipe with this heavy-duty 2-inch upgrade from Wehrli Custom Fabrication. This up pipe is engineered to solve the common cracking and leaking issues found in original equipment (OE) bellows, specifically improving turbo spool-up and managing exhaust gas temperatures (EGTs). Constructed from 11-gauge stainless steel, this component is fully TIG-welded to withstand the thermal stress of both single and compound turbo configurations.

• Heavy-Duty Construction: 11 GA stainless steel 2-inch diameter tubing for maximum durability.
• Improved Bellows: Features a reinforced stainless steel bellows that resists cracking under high pressure and heat.
• Turbo Compatibility: Works with any single or compound turbo setup that utilizes factory-style mounting points.
• Manifold Fitment: Compatible with OEM exhaust manifolds or WCFab Duramax Billet Exhaust Manifolds (Part #WCF100363).
• Direct Replacement: Replaces GM part numbers 98066019, 12637379, and 12634564.
• Complete Kit: Includes two (2) up pipe gaskets.

Note: 2007.5-2010 LMM models require a coolant bypass/relocation fitting (WCF100798) for proper installation. Made in the USA.