MBRP GM8428 3 Inch Turbo Down Pipe for 2015-2016 Duramax 6.6L

The MBRP GM8428 is a high-performance 3-inch turbo downpipe engineered specifically for 2015-2016 Chevrolet Silverado and GMC Sierra 2500/3500 HD trucks equipped with the 6.6L Duramax diesel engine. This downpipe is a critical component for improving exhaust flow from the turbocharger, reducing backpressure and unlocking additional horsepower and torque from your Duramax powerplant.

Key Features:

• Black powder-coated aluminized steel construction for corrosion resistance and aggressive styling
• Smooth mandrel-bent tubing eliminates restrictions and maximizes exhaust flow
• 3-inch diameter provides significant improvement over the factory restrictive downpipe
• Bolt-on installation with factory-style 3-bolt flange connection at turbo outlet
• Enhanced exhaust flow delivers improved throttle response and fuel economy
• Rich, deep exhaust tone that complements diesel performance

Construction and Durability:

Manufactured from heavy-gauge aluminized steel with a high-heat black powder coating, this downpipe is built to withstand extreme exhaust temperatures while resisting rust and corrosion. The mandrel-bent design ensures consistent pipe diameter throughout all bends, eliminating flow restrictions and turbulence that rob your engine of power. Best suited for dry climates with minimal road salt exposure.

Warranty:

MBRP backs the black powder coating with a 1-year warranty against factory defects, while the remaining components are covered by an industry-leading 3-year warranty.

Important Notes:

• Requires 3-bolt flange style turbo connection (factory configuration)
• Not legal for sale or use in California (not CARB compliant)
• Off-road use only in emissions-regulated states