Porsche 955 Cayenne S Fabspeed XperTune Performance Software (2002-2007) Tunes & Software Primary Catbypass Downpipes (Race Package)

Primary Catbypass Downpipes (Race Package) replace the restrictive primary factory catalysts with straight-through mandrel-bent tubing sections for maximum performance and exhaust sound

Please review our Tuning Guide in the instructions above and email the ECU Tuning Information form to us

our tuner will email you a custom ECU Tune(s) within 1-2 business days

Equal length CNC mandrel-bent primary tubes and F1-style high velocity merge collectors ensure maximum flow characteristics

Anodized gold to match the zinc plated hardware that's is all Porsche 911 flat-six engine bays

Porsche 955 Cayenne S Fabspeed XperTune Performance Software (2002-2007) Tunes & Software Primary Catbypass Downpipes (Race Package)Achieve maximum power from the Porsche Cayenne S 4. 5L V8 engine without sacrificing drivability or reliability by optimizing the engine's performance. Fabspeed Motorsport offers an alternative tuning method for vehicles equipped with ECU's that traditionally required bench flashing. No longer do you need to remove your ECU and mail it in for a tune. The Handheld device interfaces with the OBD II port on your vehicle and your computer to complete the