HMF Performance Series komplette Auspuffanlage - Gebürsteter Edelstahl Edelstahl Polaris RZR XP/4 1000The Performance Series exhaust is the foundation that HMF was built on. The specially designed, unrestricted core allows the exhaust to increase power throughout the power curve. While our signature sound lets them know its an HMF, our endless color combinations let them know its your pipe. Be informed that fuel tuning is highly recommended or required when installing and HMF exhaust.