The Straightline Performance Ski-Doo 600R REV Gen 4 Ultra-Light Muffler is a fully polished stainless steel exhaust upgrade that removes an incredible 11.5 pounds from your sled. Dyno tested, field proven, and precision TIG welded, this direct bolt-on muffler improves handling, throttle response, and overall performance without requiring clutching, fuel, or ECU changes. Designed specifically for REV Gen 4 600R E-TEC models, it delivers maximum weight savings with premium fit and finish.