Fits: 2004.5 Thru 2010  Chevy Silverado/GMC Sierra 2500HD/3500HD LLY/LBZ/LMM Duramax Diesel 

This high-performance 3” mandrel-bent turbo downpipe is designed to replace the restrictive factory downpipe with smooth, consistent bends that significantly improve exhaust flow. By eliminating crushed sections found in the OEM design, it reduces backpressure for quicker turbo response, lower EGTs, and improved overall efficiency, especially under load. Built from 304 stainless steel for superior heat resistance and long-term durability, and thermally wrapped to help control under-hood temperatures, this downpipe delivers measurable performance gains while remaining 50-state legal with CARB EO approval.

Features:

• Fits 2004.5 - 2010 LLY - LBZ - LMM applications.
• 3" diameter 304 stainless steel material for superior thermal qualities.
• Far superior to 409ss or mild steel. (You wouldn't really use mild steel for a turbo down pipe would you?)
• Thermal heat wrapped to reduce under hood temperature.

Notes: 

• 50 State Legal CARB EO# D-765