ARH - Long Tube Headers & Connecting Pipes (04-06 Pontiac GTO) LT4 allowing you to tune the

allowing you to tune the amount of torsional spring rate and determine the handling characteristics (understeer/oversteer) of the vehicle

The overall length has been shortened to correct camber on lowered vehicles

Tested by two of the most respected engine builders in the industry

When looking through the grill opening on other systems

ARH - Long Tube Headers & Connecting Pipes (04-06 Pontiac GTO) LT4 allowing you to tune theARH GTO systems are here to make a statement. Manufactured in 304 S S, these headers are available with 1 3 4" or 1 7 8" primaries. Merge collectors with scavenger spikes are standard along with our bullet proof high flow metallic substrate cats. Expect outstanding performance gains throughout the RPM range and a fit and finish second to none .