The aFe ATLAS 3in Turbo Downpipe (49-04034) dramatically improves exhaust flow for 2004.5-2010 Chevy Silverado and GMC Sierra 2500HD/3500HD trucks with 6.6L Duramax diesel engines. This performance upgrade replaces the restrictive factory downpipe with mandrel-bent 3" steel tubing for increased airflow and faster turbo spool.
Key Features :
Direct-fit replacement for 2004.5-2010 GM 6.6L Duramax (LLY/LBZ/LMM)
3" mandrel-bent steel construction for optimal exhaust flow
CNC-machined V-band flanges ensure leak-free 360° seal
Black finish with thermal header tape reduces EGTs
Uses factory mounting points for true bolt-on installation
Smoother bends reduce turbulence for quicker turbo response
Lowers underhood temperatures for improved performance
The ATLAS downpipe features precision-engineered mandrel bends that maintain consistent diameter throughout the exhaust path, eliminating the restrictions found in stock piping. The included thermal header tape wrap helps maintain lower exhaust gas temperatures, even during heavy towing or performance driving.
Installation is simplified with OEM-style V-band connections that provide a perfect seal without leaks, while maintaining all factory mounting locations. The durable black finish resists corrosion while keeping a low-profile appearance under your truck.
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