This driver-side no-pinch exhaust manifold fits 2001–2015 GM 6.6L Duramax diesel engines as a direct bolt-on upgrade for 2001–2008 trucks. The factory manifold was formed with a pinch/crease for steering column clearance that restricts three of the four cylinders on the driver side to 80% flow, causing exhaust pressure imbalance and higher EGTs. This no-pinch design removes that restriction to restore flow, supporting better turbo response and overall exhaust efficiency for daily driving, towing, hauling, and performance-focused builds.

Fitment

• 2001–2008 Chevrolet Silverado and GMC Sierra 2500/3500 with 6.6L Duramax diesel (direct bolt-on)
• 2009–2015 Chevrolet Silverado and GMC Sierra 2500/3500 with 6.6L Duramax diesel (factory replacement)
• Compatible with LB7, LLY, LBZ, LMM, and LML engine codes

Product Details

• Material: High-quality ductile silica moly cast iron
• Weight: 10.8 lbs
• Package Dimensions: 9.0" W × 4.0" H × 25.0" L
• Included Hardware: Exhaust manifold gasket, exhaust outlet gasket, and three Y-pipe bolts with washers
• Performance Benefits: Flows better than the original driver-side manifold with less restriction to match passenger-side manifold flow

Installation

This is a direct bolt-on upgrade for 2001–2008 trucks; consult with a qualified mechanic before attempting installation. All necessary gaskets and fasteners are included for driver-side installation only.

Check local emissions regulations before purchase. Professional installation is recommended.

Get the right part the first time.