HONDA CR-Z CRZ N1 2.5" EXHAUST CATBACK EXHAUST SYSTEM w/ 4.5" TIP Fitment: 2011+ HONDA CR-Z SUS-304 Stainless Made Steel with Polish Finish. Comes with Removable Silencer. 65mm Full Stainless Steel Piping with 4.5" N1 Exhaust Tip Designed for high performance as well as meeting sound level standards. With its deep throaty tone, it echoes its racing lineage. Optimize torque in the low to mid speed range N1 Design to Gain More Horse Power, Faster Response, Averaging 15-20 Extra HP PROFESSIONAL INSTALLATION IS HIGHLY RECOMMENDED. NO INSTALLATION GUIDE IS AVAILABLE.