2009-2012 ACURA TL BASE DUAL CATBACK STAINLESS STEEL EXHAUST MUFFLER 4" TIP Fitment: 2009-2012 Acura TL Base Model Dual Catback Exhaust System SUS-304 Stainless Steel Made with Polish Finish. Uses 2.25" (60mm) piping with a 4" outlet dual mufflers. Comes with flanges and connector bolts Designed for high performance as well as meeting sound level standards. With its deep throaty tone. Optimize torque in the low to mid speed range Dual Tip N1 Design to Gain More Horse Power, Faster Response, Averaging 15-20 Extra HP PROFESSIONAL INSTALLATION IS HIGHLY RECOMMENDED. NO INSTALLATION GUIDE IS AVAILABLE.