ATS Pulse Flow Exhaust Manifold Kit Fits 2001-2004 6.6L Duramax " Disaster Kits The increased capacity comes from

The increased capacity comes from the material itself

Great way to improve performance and keep authentic period correct appearance

Corrosion Resistant - Black oxide finish protects against rust and harsh diesel exhaust environments

The narrow track knuckle reduces the total track width change by about 1

ATS Pulse Flow Exhaust Manifold Kit Fits 2001-2004 6.6L Duramax " Disaster Kits The increased capacity comes fromATS Pulse Flow Exhaust Manifolds for the 2001 to 2004 6. 6L Duramax offer far less restriction than stock manifolds and up pipes. Channel areas were increased dramatically resulting in a 26 percent increase in airflow. Not only will the Pulse Flow manifolds improve performance, they are a leap forward on reliability. Cast out of High Silica Moly, these manifolds have the ability to run through more heat cycles (lifetimes worth) without fatigue,