The HMF Ballance Pro exhaust system is designed to be a customizable exhaust system that meets the needs of your riding conditions. Tuning your ATV to match your course can make the difference between first and not, which is why HMF designed the Ballance Pro exhaust with the TRM core that allows you to fine tune the ATV's low end torque. The Ballance Pro tunable system was designed to meet the demands of GNCC racing. HMF built the Ballance Pro complete exhaust system with a larger diameter stepped head pipe that reduces exhaust flow to boost power. The sleeve of the Ballance Pro muffler is extruded 6061 aluminum which shaves weight without compromising durability. To provide a durable exhaust system HMF uses 304 stainless steel that will stand up to wheel to wheel racing battles. Go where the trail takes you without being hassled by the BLM with the USFS approved spark arrestor that is included with the Ballance Pro compete exhaust system. HMF engineered the Ballance Pro exhaust in the USA from start to finish. A two year warranty is thrown in with the Ballance Pro complete exhaust system to let you know HMF stands behind their quality products.