BLACK DIAMOND EXHAUST VALVE HD SPORSTER 1200CC 86-03 UTV Vehicles>>Polaris>>Ranger Experience significant performance improvements in

Experience significant performance improvements in one convenient package

and work with our existing turn signal kits

Whether it's your kids or your spouse

Tested and proven on street

and low restriction air filters

BLACK DIAMOND EXHAUST VALVE HD SPORSTER 1200CC 86-03 UTV Vehicles>>Polaris>>Ranger Experience significant performance improvements inAll KPMI Black Diamond stainless steel valves are impregnated by a special German process to a depth of . 002, with a surface build up of . 0002. This Black Diamond process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Black Diamond Valves are light, strong, one piece forgings with profiles that provide excellent flow characteristics.