The dyno tests show WCC headers produce more power for a longer period of time compared to other packages tested. We measured 396 rwhp which is 1hp less and 399 ft./lbs of torque which is 7 ft./lbs of torque more than the next best set. The WCC headers are ceramic-coated for longevity and temperature control. They use 1.750" primary tubes, 3" merge collectors and have air tube and oxygen fittings in place. In addition to producing great power, they also provide the most ground clearance of all long tube headers.