Solo Performance Cat Back Exhaust for 2007 - 2015 SMART Car Center Dual Tip 2007 - 2015 Smart Car Center Dual Exhaust All Stainless steel Piping with T304 Polished Stainless Steel Dual 3" Tips. High Flow Stainless Steel Muffler Easy Bolt on Design. Includes Muffler Assembly 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.