Pro-X 28.SES3338-1 Steel Exhaust Valve and Spring Kit tires-wheels-tubes-valve-stems-valve-stems CO2 and water vapor exit

CO2 and water vapor exit mask through pair of one-way exhaust valves

2001-2005 Honda TRX250EX Sportrax

2014-2016 Kawasaki KX250F

2021-2023 Polaris Sportsman 570 Trail

2020-2023 Kawasaki KLX230R

Pro-X 28.SES3338-1 Steel Exhaust Valve and Spring Kit tires-wheels-tubes-valve-stems-valve-stems CO2 and water vapor exitMaterial: Steel Replaces the OEM valves & valve springs. Steel, nitrided valves for increased durability and less wear under extreme conditions. Stronger valve springs deal with the extra weight of the steel valves. Springs are made from premium chrome vanadium steel for higher performance and durability at high rpm. Kit contains a set of steel intake or exhaust valves plus a set of specially designed valve springs; can be installed using the OEM