Solo Performance High Flow Catalytic Converters for G8 V8 Models 2008 - 2009 Pontiac G8 GT & GXP High Flow Cats. Direct Fit Stainless Steel High Flow converters that work with factory Exhaust Easy Bolt on Design. All Parts included for installation 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.