Top End

All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistanceMade in the U.S.A. Honda -- CRF450RWE -- (2020, 2021, 2022, 2019); Honda -- CRF450RX --...

All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistanceMade in the U.S.A. Honda -- CRF450RX -- (2021, 2020, 2022, 2017, 2018, 2019); Honda --...

Precision-machined from C630Compatible with no-lead fuel and accept any type of valve-stem materialProvide maximum service with chromed valve stemsFeature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...

All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistanceMade in the U.S.A. Honda -- CRF450RWE -- (2020, 2021, 2022, 2019); Honda -- CRF450RX --...

All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistanceMade in the U.S.A. Honda -- CRF450RX -- (2021, 2020, 2022, 2018, 2017, 2019); Honda --...

Precision-machined from C630Compatible with no-lead fuel and accept any type of valve-stem materialProvide maximum service with chromed valve stemsFeature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...

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

The only safe way to maximize compression; the valve reliefs in the piston are purposely convex and match the geometry of the dishes in the valvesConversion to Black Diamond? stainless steel valves offers up to twice the life of the stock titanium...

The only safe way to maximize compression; the valve reliefs in the piston are purposely convex and match the geometry of the dishes in the valvesConversion to Black Diamond? stainless steel valves offers up to twice the life of the stock titanium...

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

Black Diamond? valves are CNC machined from one-piece forgings of EV8 Stainless SteelBlack Diamond? proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wearMade in the U.S.A. Honda -- CRF250R -- (2016, 2017)

Black Diamond? valves are CNC machined from one-piece forgings of EV8 Stainless SteelBlack Diamond? proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wearMade in the U.S.A. Honda -- CRF250R -- (2016, 2017)