Uploaded August 2016 | Updated September 2026, 2 weeks ago
Revving a Porsche GT4 before and after FABSPEED sport headers. In person (valves open), the difference is a bit more distinguishable. The increase in pops/burbles is significant when driving, shifting up and down! It has increased volume, but not overwhelming. Notice after the first rev at 37 seconds how we laugh with excitement. With valves closed, the sound seems close to that with stock headers. Recording done with iPhone. Installed the headers myself and it was straight-forward.
(unbelievable that I posted this with a misspelling on the intro - duh!)
Revving a Porsche GT4 before and after FABSPEED sport headers. In person (valves open), the difference is a bit more distinguishable. The increase in pops/burbles is significant when driving, shifting up and down! It has increased volume, but not overwhelming. Notice after the first rev at 37 seconds how we laugh with excitement. With valves closed, the sound seems close to that with stock headers. Recording done with iPhone. Installed the headers myself and it was straight-forward.
(unbelievable that I posted this with a misspelling on the intro - duh!)
