Developed and tested in the heat of over 24 months of factory level racing Aggressive, intelligently designed, asymmetrical shaped RS-12 profile allows maximized muffler volume that helps manage sound, add power and provide more clearance for tire and brake caliper Improved performance gains, weight reduction and fit when compared to previous generation design Works-look matte carbon fiber end cap with industry leading design and innovation end cap detailing as expected from Yoshimura Carbon end cap covers inner cap mounted design improves durability, and eases servicing as compared to other sandwich mounting designs most commonly found in the industry New patent pending Precision Taper Fit (PTF) insert ring makes it easy to install and remove sound inserts and spark arrestors Tapered muffler body inlet design of RS-12 enables the system to be pushed forward thus helping with weight centralization without sacrificing performance Proudly designed, developed and made in the USA! Yoshimura Full system weight 8.5 lbs. vs Stock Weight 8.7lbs