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...

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...

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...

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...

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...

Made in the U.S.A. Compatible Vehicles Years

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...

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...

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...

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...

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...

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...