Porsche 981 GT4/Spider Exhaust Racing Headers side muffler bypass The GT4 is not just

The GT4 is not just a "car" that is driven from point A to point B

It is quieter than the track use system and is street / emissions legal

We determined the shortcomings of the OEM system and made significant improvements to the exhaust flow characteristics

Our header design helps reduce exhaust restriction and temperatures for increased overall power while improving the header integrity

and federals laws before buying and installing these or any aftermarket parts to be sure whether usage is in violation

Porsche 981 GT4/Spider Exhaust Racing Headers side muffler bypass The GT4 is not justPerformance Perfection Redefined. The Porsche 981 GT4 is one of the greatest modern day mid engine cars on the road and racetrack. We produced 453HP at the crank using these headers and a tuned plenum! The tried and true Flat 6 power plant has proven itself as a bulletproof platform for modern day endurance race cars. The GT4 is not just a "car" that is driven from point A to point B, but a machine that is often pushed to its limits on twisty mountain