Unlock +17 WHP on your Porsche 718 GT4 RS with Fi EXHAUST. Dyno-tested performance gains without ECU tuning or CEL. Experience pure motorsport sound and proven power.
Having trouble with your Fi EXHAUST valve system? Follow our complete troubleshooting guide — from checking the remote and control box to inspecting the solenoid and vacuum tube — to quickly identify the issue.
Automotive journalist Johnny Lieberman builds a wild Toyota GR Corolla featuring a custom Fi EXHAUST quad-exit catback and downpipe. Hear how our system helped him transform the car into a Porsche-chaser in the canyons.
