Solo Performance High Flow catalytic Converters for 2010 - 2015 Camaro V8 Automatic Transmission 5th Gen L99 2010 - 2015 Camaro SS HF Catalytic Converters (Recommended for Auto Transmission) Easy Bolt on Design and All parts included for easy installation Efficient cat bodies for great flow. Not CARB certified, Not intended for street use.Q Track use only in NY, CA Free Tee shirt with every order. Sm, Med, Lg, XL , 2XL & 3XL available. PM us your size when you order or we will include an XL.