Pro-X 28.SES6329-1 Steel Exhaust Valve and Spring Kit body-cabs-accessories-cab-enclosures Unshrouded combustion chamber

Unshrouded combustion chamber

2011-2020 Ski-Doo Expedition Sport 600 ACE

2000-2006 Honda XR650R

1993-1994 Honda CR500R

2003 Arctic Cat Z 440 Sno Pro

Pro-X 28.SES6329-1 Steel Exhaust Valve and Spring Kit body-cabs-accessories-cab-enclosures Unshrouded combustion chamberReplaces 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 retainers, bases and