Valvetrain

Kits include KPMI® or equivalent valve spring kit, a full set of Black Diamond™ stainless steel standard size valves and are black nitride coated, H.T. (Heat Treated) steel valve keepers and valve stem seals (where applicable) for engine...

Kits include KPMI® or equivalent valve spring kit, a full set of Black Diamond™ stainless steel standard size valves and are black nitride coated, H.T. (Heat Treated) steel valve keepers and valve stem seals (where applicable) for engine...

Kits include KPMI® or equivalent valve spring kit, a full set of Black Diamond™ stainless steel standard size valves and are black nitride coated, H.T. (Heat Treated) steel valve keepers and valve stem seals (where applicable) for engine...

Kits include KPMI® or equivalent valve spring kit, a full set of Black Diamond™ stainless steel standard size valves and are black nitride coated, H.T. (Heat Treated) steel valve keepers and valve stem seals (where applicable) for engine...

Kits include KPMI® or equivalent valve spring kit, a full set of Black Diamond™ stainless steel standard size valves and are black nitride coated, H.T. (Heat Treated) steel valve keepers and valve stem seals (where applicable) for engine...

Softer Manganese guides can be easily reamed with a battery-operated or electric drill and finished with a high-quality ball hone Tapered nose design for maximum bearing surface and minimal port obstruction Accepts OEM top hat valve seals and OEM...

Softer Manganese guides can be easily reamed with a battery-operated or electric drill and finished with a high-quality ball hone Tapered nose design for maximum bearing surface and minimal port obstruction Accepts OEM top hat valve seals and OEM...

Softer Manganese guides can be easily reamed with a battery-operated or electric drill and finished with a high-quality ball hone Tapered nose design for maximum bearing surface and minimal port obstruction Accepts OEM top hat valve seals and OEM...

Made in the U.S.A. Compatible Vehicles Years Make Make Notes 1978-1983 Harley-Davidson Roadster XLS 1977-1978 Harley-Davidson Sportster 1000 Touring XLT 1972-1979 Harley-Davidson Sportster 1000 XLCH 1972-1983 Harley-Davidson Sportster...

Some Twin Cam heads using 7.0mm valves may crack in the port end of the valve guide boss These valves have .005" oversize stems to re-establish the correct valve stem to valve guide clearance if the head has cracked Valve guides must be...

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 ...

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 ...