Engine

Kits include KPMI« or equivalent valve spring kit, a full set of Black DiamondÖstainless steel standard size valves, H.T. Steel valve keepers and valve stem seals (where applicable) for engine applications listed All valves are impregnated by a special...

Black Diamond? valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce friction; White Diamond? valves feature one-piece construction and hard chrome stems Spring sets...

Spring kit contains springs and titanium upper collars; lower collars included as required; spring kits are engineered for use with standard and oversized valves Spring kit comes complete for one motor Keepers are not included Made in the U.S.A.. YZ250F...

Stainless steel conversion kit includes only what's needed to convert your head to the long-life stainless steel Black Diamond intake valves Extends the life of the valvetrain and intake components by as much as 4x over the OEM titanium parts Includes...

Spring kit is designed with increased spring rates and high lift compatibility compared to the stock springs Compatible with boosted or turbocharged applications CNC-machined titanium retainers and Cr-Si dual springs provide valvetrain control at high...

Kits include KPMI« or equivalent valve spring kit, a full set of Black DiamondÖstainless steel standard size valves, H.T. Steel valve keepers and valve stem seals (where applicable) for engine applications listed All valves are impregnated by a special...

Kits include KPMI« or equivalent valve spring kit, a full set of Black DiamondÖstainless steel standard size valves, H.T. Steel valve keepers and valve stem seals (where applicable) for engine applications listed All valves are impregnated by a special...

Kits include KPMI« or equivalent valve spring kit, a full set of Black DiamondÖstainless steel standard size valves, H.T. Steel valve keepers and valve stem seals (where applicable) for engine applications listed All valves are impregnated by a special...

Kits include KPMI« or equivalent valve spring kit, a full set of Black DiamondÖstainless steel standard size valves, H.T. Steel valve keepers and valve stem seals (where applicable) for engine applications listed All valves are impregnated by a special...

Black Diamond? valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce friction; White Diamond? valves feature one-piece construction and hard chrome stems Spring sets...

Spring kit is designed with increased spring rates and high lift compatibility compared to the stock springs Compatible with boosted or turbocharged applications CNC-machined titanium retainers and Cr-Si dual springs provide valvetrain control at high...

Spring kit contains springs and titanium upper collars; lower collars included as required; spring kits are engineered for use with standard and oversized valves Spring kit comes complete for one motor Keepers are not included Made in the U.S.A.. SPRING...