We design after market exhausts for all different kinds of sport, work, and recreational off-road and on road vehicles. HMF Exhaust is a brand of aftermarket muffler that is known well through the off-road community as one of the high performance aftermarket parts for quads and atvs. Our aftermarket muffler systems don't just stop at quads. At HMF, we offer a full line of aftermarket exhausts for off-road dirtbikes as well. We see the same performance increases in both horsepower and torque that we do on our atv and quad after market systems. We take it even a step further and stick to our roots by offering after market exhaust systems for street motorcycles too. Our silencers have a very distinct sound when they're installed on a street motorcycle. Our aftermarket exhaust systems scream down the street on these high end motorcycles. It's no wonder thousands of riders are switching their after market exhaust systems to HMF.