Skunk2 413-05-6055 MegaPower RR Exhaust System for Honda Civic Si Designed for heavily modified naturally aspirated engines as well as for turbocharged applications Featuring Japanese-spec, Super N1 styling, MegaPower RR Exhaust systems generate more horsepower Each system is fitted with a resonator, includes stainless steel flanges, and is finished off with a straight-through, low-restriction racing muffler for uninterrupted flow