Engine

Designed to out-perform and outlast the factory valve springs Kit features lightweight, high-strength CrSi valve springs, H.T. steel base washers and titanium spring retainers Complete kit, everything you need to for a complete valve spring swap. VALVE...

Designed to out-perform and outlast the factory valve springs Kit features lightweight, high-strength CrSi valve springs, H.T. steel base washers and titanium spring retainers Complete kit, everything you need to for a complete valve spring swap. VALVE...

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...

Designed to out-perform and outlast the factory valve springs Kit features lightweight, high-strength CrSi valve springs, H.T. steel base washers and titanium spring retainers Complete kit, everything you need to for a complete valve spring swap. VALVE...

All components made in the U.S.A.. TAPPETS 16/PK ZX10R

All components made in the U.S.A.. TAPPETS 16/PK ZX10R

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...

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...

These high quality replacement springs have been designed to exceeds the OEM specifications by fitting precisely on the spring shoulder diameter of both the OEM retainers, and KPMI« H.T. Steel retainers This kit also includes H.T. Steel basewashers in...

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...

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 GSXR

These high quality replacement springs have been designed to exceeds the OEM specifications by fitting precisely on the spring shoulder diameter of both the OEM retainers, and KPMI« H.T. Steel retainers This kit also includes H.T. Steel basewashers in...