M4 Street Slayer Carbon Fiber Slip-on Exhaust – Yamaha R3 / MT-03

This shorty carbon fiber slipon exhaust from M4 is unique because it is the only slip-on exhaust that eliminates the stock catalytic converter and silencer.  Most slip-on exhaust systems retain the stock silencer (the big heavy block under the bike) and catalytic converter and therefore can only change the sound of the exhaust and the performance a certain amount because most of the sound and performance is limited by the silencer and catalytic converter.  The M4 Street Slayer is the only slip-on exhaust system that removes the stock silencer and gives you a whole new sound for your Yamaha R3.  By removing the silencer and catalytic converter, the M4 Street Slayer also drastically improves the performance of the R3 and also drops a whopping 11.5 lbs off the weight of the bike.  The M4 Street Slayer exhaust has an O2 sensor bung for an 18mm wide band O2 sensor and comes with a reducer to fit the stock 12mm narrow band O2 sensor as well.

-Comes pre-installed with Q5 quiet insert
-Stage 2 Q4 extra quiet insert sold separately for $56 (this exhaust is REALLY loud without the stage 2 Q4 extra quiet insert)

***IMPORTANT***

To install the M4 Street Slayer, you must first cut off the silencer and catalytic converter from the OEM exhaust header pipe, then the Street Slayer slips on.  See installation instructions here for complete details.  This M4 product alters the motorcycle manufacturer’s original emission controls equipment and is not suitable for use on public roads. It is designed and sold for closed course competition use only. It is the customer’s responsibility to know their local and federal laws.