ISIS Performance GT Single Exhaust - Hyundai Genesis Coupe 2.0T 09+ This is a Race type Straight pipe exhaust system. Straight 3" diameter piping to a single 4.5" tips. This exhaust has a resonator but no mufflers. It is an awesome sounding straight pipe exhaust. full polished exhaust Mid to High End Power and Aggressive Design. Extremely High Quality, Tig Welded, stainless steel. Includes all gaskets and hardware required for install.