Engine

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 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...

By taking advantage of the latest development in valve spring wire chemistry and manufacturing techniques, By coupling these developments with strict KPMI« design protocols and employing multiple design simulation and FEA analysis software, we were we...

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...

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...

Extensive R&D on all applications to provide high-performance components that last longer than OEM Titanium retainers are made from 6AL4V titanium alloy; designed to be the strongest and lightest for ultimate performance Keepers not included; use OEM...

Titanium retainers are made from 6AL4V titanium alloy; designed to be the strongest and lightest for ultimate performance All components made in the U.S.A.. RETAINER SET 16/PK ZX10R

Titanium retainers are made from 6AL4V titanium alloy; designed to be the strongest and lightest for ultimate performance All components made in the U.S.A.. RETAINER SET 16/PK ZX10R

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...

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.. CRF450...

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...

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...