ISR Performance GT Single Exhaust - Hyundai Genesis Coupe 3.8 This is a Race type Straight pipe exhaust system. Straight 3" diameter piping to a single 4.5" tips. This exhaust has a resonator and a muffler and 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. What's in the box: 1x Resonated front pipe 1x 3.8 Y-pipe 1x muffler section with 4.5in tips exhaust gaskets 8x Bolts 8x Nuts