MRCI High Performance Exhaust Systems for OS , YS, and 55size OS Helicopter engines are an elegantly blended combination of dyno tested tuned performance, and unique & beautiful Italian styling. Built on a hybrid 2 piece design, the MRCI mufflers will provide excellent vibration isolation thanks to this 2 piece mounting system.

The MRCI Mufflers are also compatible with Hatori 2 piece mounting headers, so you can simply unbolt a Hatori Pipe, and install the MRCI pipe in a matter of minutes!

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