MBRP GMCA427 3 Inch Turbo Down Pipe CARB Compliant for Duramax

The MBRP GMCA427 is a high-performance 3-inch turbo down pipe engineered specifically for 2011-2015 Chevrolet Silverado and GMC Sierra 2500/3500 trucks equipped with the 6.6L Duramax diesel engine. This CARB-compliant downpipe features Executive Order Number D-763-2, making it legal for sale and use in all 50 states including California.

Constructed from heavy-gauge aluminized steel with a durable black powder coating on the exterior, this downpipe offers both corrosion resistance and an aggressive appearance. The mandrel-bent design ensures smooth, unrestricted exhaust flow by eliminating the crimping and restrictions found in crush-bent pipes, allowing exhaust gases to exit more efficiently for improved turbo spool, reduced backpressure, and enhanced throttle response.

Key Features:

• 3-inch mandrel-bent aluminized steel construction for maximum exhaust flow
• Black powder-coated finish for corrosion resistance and style
• CARB Executive Order D-763-2 for 50-state legal compliance
• Bolt-on installation with factory-style flanges
• Designed to reduce exhaust gas temperatures and improve turbo efficiency
• 1-year warranty on black powder coating, 3-year warranty on remaining components

Important Note: This downpipe is not compatible with 3-bolt flange style turbo connections. Verify your factory turbo flange configuration before ordering.

Ideal for Duramax owners seeking improved performance while maintaining emissions compliance, this downpipe delivers the quality and fitment MBRP is known for in the diesel performance market.