The TurboXS RX8 High Flow Cat is a great alternative to running a completely catless exhaust. We use a 200 cell metal matrix cat for high exhaust flow and to compliment the exhaust tone with add a resonator to help lower the exhaust noise and keep the db levels down while maintaining high exhaust gas velocity. Perfect when combined with the RX8-CBE.? This is a high flow cat so you still may get a CEL.

NOTE:  This part can ONLY be used with the TurboXS Catback Exhaust.  It can NOT be used with your stock catback exhaust.