JDM DC5 Integra Type R Full Exhaust. The DC5R muffler has a built in valve that opens at higher RPMs. When the valve opens, it bypasses several internal chambers, allowing a reduction in exhaust back pressure, and increases flow. This valve gives the DC5R better performance over the OEM Type S catback, while still maintaining factory sound for daily driving. DC5R has a larger pipe diameter as well. Muffler and B pipe are in good condition. Exhaust tip does have a slight bend from shipping. Actual pictures shown.