Lighten up your snowmobile by replacing the stock silencer with SLP's lightweight version. So what sets SLP silencers apart from the rest? For starters, 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. We strive for the quality, robust sound that you desire while keeping the sound levels low. Many of our models have been tested by SLP and passed the SAE J-2567 stationary sound test below the state adopted 88 decibel limit. All silencers are finished with ceramic coating which not only looks great, but also reduces radiant heat emissions by as much as 40%, resulting in cooler underhood temperatures. This silencer reduces weight by 14.8 pounds. ERA 2014 Silencing Technology SLP tested and passed SAE J-2567 stationary sound test below 88 decibels. This silencer is Not compatible with SLP Single Pipe. NO ECU Modification is required.