Elevate your 2017-2021 Honda Civic Si coupe's performance with GReddy's Supreme SP cat-back exhaust system. Meticulously engineered to enhance the turbocharged L15B engine, this system promises GReddy's signature deep exhaust tone and impressive flow. The full 3-piece configuration begins with a 76mm (3-inch) diameter front and mid-pipe assembly that seamlessly attaches to the stock downpipe, splitting into two lustrous SP oval mufflers that conclude with center-exit, dual-wall tips of 105mm each. These features not only amplify the Civic Si's athletic stance but also harmonize with the aggressive rear bumper. Optimal for FC3 chassis owners looking for a blend of aesthetics and auditory bliss. Also available for FC1 sedan enthusiasts. All Supreme SP systems are crafted from 304 stainless steel, hand-welded to perfection, and come with GReddy's trusted Limited Lifetime Warranty.

Each Supreme SP exhaust kit includes necessary 3-inch oval gaskets for a leak-free installation and features a built-in resonator to fine-tune the exhaust note. Embrace the quality, performance, and sound that only a GReddy Supreme SP exhaust can provide for your Honda Civic Si.