ATS Diesel 2001-04 6.6L Duramax Non-EGR Pulse Flow Exhaust Manifolds (Set of 2) OPT7 Lighting Inc All aluminum construction is strong

All aluminum construction is strong

and drop the tent assembly with extrusion attached onto the Crossbar Ends

Valve spring performance is very important for valves to follow accurate cam profile

Notes: (1) Turbo or Supercharger (2) Nitrous (4) Works with B16A / B18A / B18C Head

Replacing your Filters

ATS Diesel 2001-04 6.6L Duramax Non-EGR Pulse Flow Exhaust Manifolds (Set of 2) OPT7 Lighting Inc All aluminum construction is strongPulse Flow Exhaust Manifolds 2001 04 6. 6L Duramax, Non EGR ATS Pulse Flow Exhaust Manifolds 2001 2004 LB7 & Non EGR 6. 6L Duramax ** California E. O. Certified ** ATS 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% increase in airflow. Not only will the Pulse Flow manifolds improve performance, they are a leap