Invidia Q300 Valved Cat Back Exhaust - Rolled Black Stainless Tips - Ford Focus RS Mk3 LZ 16-17The New Release Q300 Cat back Exhaust to suit the Ford Focus RS. Comes with factory style housing to suit the OEM Exhaust Valve. INVIDIA 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