Lighten up your snowmobile by replacing the stock silencer with SLP’s lightweight version. Each SLP silencer has been dyno tested and field verified to insure maximum reliable horsepower is attained while shedding the desired weight. Sound level emissions are also a focus at SLP; They strive for the quality, robust sound that you desire while keeping the sound levels low. Finished with ceramic coating which not only looks great, but also reduces radiant heat emissions by as much as 40%, resulting in cooler under hood temperatures. ERA 2014 Silencing Technology. SLP tested and passed SAE J-2567 stationary sound test below 88 decibels.. Silencer is not compatible with SLP Single Pipe.. No ECU Modification is required..