Engine

Extensive R&D on all applications to provide high-performance components that last longer than OEM Black Diamond valves are one-piece forgings made from 21-4N high-performance stainless steel Trademarked Black Diamond treatment provides a stem that has a...

Black DiamondÖ valves are CNC machined from one-piece forgings of EV8 Stainless Steel Black DiamondÖ proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wear Made in the U.S.A. Must use Kibblewhite«...

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 resistance Made in the U.S.A.. GUIDE EX STD HON1000 16+

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 resistance Made in the U.S.A.. GUIDE VLV EX 010 KX250F

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 resistance Made in the U.S.A.. GUIDE VLV IN 010 KX250F

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 resistance Made in the U.S.A.. GUIDE VLV EX 010 CRF250R

Precision-machined from C630 Compatible with no-lead fuel and accept any type of valve-stem material Provide maximum service with chromed valve stems Feature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...

Each kit includes all necessary gaskets, washers, seals and O-rings; kit contents vary by model. GASKET KIT WP REP KX250F

Each kit includes all necessary gaskets, washers, seals and O-rings; kit contents vary by model. GASKET KIT WP REP CR250R

These tappets have undergone extensive development to increase load, lubrication, hydraulic and life capacities Billet body Increased roller width Roller perpendicularity held to .0002" Hand-honed hydraulic unit cavity Dynamic load capacities increased...

These tappets have undergone extensive development to increase load, lubrication, hydraulic and life capacities Billet body Increased roller width Roller perpendicularity held to .0002" Hand-honed hydraulic unit cavity Dynamic load capacities increased...

The same Powerglide advantage (oil-fed axle, billet steel body, precision fit hydraulics), but now incorporates a Steady Roll bronze bushing in place of the needle bearing roller These tappets have undergone extensive development to increase load,...