Invidia Q300 Cat Back Exhaust - Rolled Titanium Blue Tips - Subaru WRX/STI GD 01-07 PORSCHE_996 if the OEM check valve

if the OEM check valve is removed (see installation instructions)

Wanting to save some money doing it

Together with Öhlins TTX 36 Advanced Trackday dampers for Audi R8

The New Release Q300 Cat back Exhaust to suit the Ford Focus RS

Invidia Q300 Cat Back Exhaust - Rolled Titanium Blue Tips - Subaru WRX/STI GD 01-07 PORSCHE_996 if the OEM check valveINVIDIA Q300 CAT BACK EXHAUST Tuned Muffler For optimal flow and enhanced sound Invidia's Q300 tuned muffler systems provide a quieter exhaust sound than both the R400 and N1 Invidia Exhausts. While still keeping volumes in check, their high flow design ensures efficient exhaust flow for optimum engine performance and prevents sacrificing any increases to power or torque. The Q300 mufflers offer a rich, deep, sporty exhaust note which enhances the