MBRP 3-Inch Direct Replacement Down Pipe Kit for 2015-2017 Chevrolet/GMC 2500/3500 HD (6.6L)

Fits 2015-2017 Chevrolet Silverado 2500 HD / 3500 HD and GMC Sierra 2500 HD / 3500 HD (6.6L).

The MBRP 3-inch direct replacement down pipe is designed to eliminate the flow restrictions found in the factory component, allowing your Duramax 6.6L engine to breathe more efficiently. By improving exhaust gas exit speeds, this kit delivers a measurable 20% increase in flow over stock, resulting in faster turbo spooling, lower exhaust gas temperatures (EGTs), and a richer diesel tone. Engineered for durability and performance, this down pipe provides bolt-on gains of +21 horsepower and +24 lb./ft. of torque.

• 3-inch diameter for optimized exhaust flow
• 20% increased flow capacity compared to OEM
• Documented gains of +21 HP and +24 lb./ft. of torque
• Direct-fit replacement for simplified installation
• Enhanced heat retention for better performance
• Not for sale or use in the state of California

Note: Removal of OEM catalytic converters may violate emissions laws in your jurisdiction. Please verify local regulations before installation.