Skunk2 MegaPower RR 17-20 Honda Civic Si Sedan Exhaust SystemDecades of race engineering are incorporated into every part Skunk2 develops. Our MegaPower Double Barrel (DB) Exhaust system for the '17 '20 Honda Civic Si is no exception. All MegaPower exhaust systems are finely tuned using CNC Mandrel bends, precision robotic TIG welds and unrestrictive resonators to maximize exhaust velocity and eliminate restriction. Featuring parallel, dual race mufflers mounted center beneath the bumper, this system emits that