Shop All

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Manganese bronze valve guides are popular in high-performance and racing engines because they offer superior wear resistance, high-temperature stre...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Manganese bronze valve guides are popular in high-performance and racing engines because they offer superior wear resistance, high-temperature stre...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Manganese bronze valve guides are popular in high-performance and racing engines because they offer superior wear resistance, high-temperature stre...

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

Oversize Exhaust Valve Guide- Manganese. Fits Twin Cam 2005-17 & Sportster 2005-2021. +.001in. Outside Diameter

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own sp...

* All KPMI Black Diamond Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface buildup of .0002. Th...

* All KPMI Black Diamond Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface buildup of .0002. Th...

White Diamond Valves are light, strong, one piece forgings with profiles that provide excellent flow characteristics. We fully CNC machine our Whit...

White Diamond Valves are light, strong, one piece forgings with profiles that provide excellent flow characteristics. We fully CNC machine our Whit...

White Diamond Valves are light, strong, one piece forgings with profiles that provide excellent flow characteristics. We fully CNC machine our Whit...

White Diamond Valves are light, strong, one piece forgings with profiles that provide excellent flow characteristics. We fully CNC machine our Whit...

* All KPMI Black Diamond Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface buildup of .0002. Th...

* All KPMI Black Diamond Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface buildup of .0002. Th...

KPMI Red 100% Viton valve stem seals are designed to have optimum fitment, allow , maximum lift, and to give maximum life. KPMI® Red valve stem sea...

KPMI Red 100% Viton valve stem seals are designed to have optimum fitment, allow , maximum lift, and to give maximum life. KPMI Red valve stem seal...

KPMI Red 100% Viton valve stem seals are designed to have optimum fitment, allow , maximum lift, and to give maximum life. KPMI® Red valve stem sea...

KPMI Red 100% Viton valve stem seals are designed to have optimum fitment, allow , maximum lift, and to give maximum life. KPMI Red valve stem seal...

KPMI offers a Premium Rocker Tower Solution * Nuts are machined from billet high tensile steel and heat treated * Studs are heat treated 180,000 PS...

Installation kit for S&S Super Stock crankcase into 2007-2016 Touring models. Required to connect Super Stock crankcase to S&S oil pan. Inc...

KPMI manufactures keepers from high tensile strength H. T. Steel. Close attention to details such as taper angle, bead location, ID, OD, radius dim...

KPMI manufactures keepers from high tensile strength H. T. Steel. Close attention to details such as taper angle, bead location, ID, OD, radius dim...

KPMI cylinder alignment dowels are machined from steel and receive a black oxide surface treatment. OEM Cylinder Alignment Dowels are often galled ...

Designed for the Harley-Davidson® Milwaukee-Eight engine, this dowel can also serve as a multi-purpose alignment pin. Our dowel incorporates OEM el...

KPMI cylinder alignment dowels are machined from steel and receive a black oxide surface treatment. OEM Cylinder Alignment Dowels are often galled ...

* Save time money when purchasing this kit * One package, everything you need for a cylinder head overhaul * Double your service life over OEM usin...

* Save time money when purchasing this kit * One package, everything you need for a cylinder head overhaul * Double your service life over OEM usin...

* Save time money when purchasing this kit * One package, everything you need for a cylinder head overhaul * Double your service life over OEM usin...

* Save time money when purchasing this kit * One package, everything you need for a cylinder head overhaul * Double your service life over OEM usin...

* Save time money when purchasing this kit * One package, everything you need for a cylinder head overhaul * Double your service life over OEM usin...

* Save time money when purchasing this kit * One package, everything you need for a cylinder head overhaul * Double your service life over OEM usin...

* Save time money when purchasing this kit * One package, everything you need for a cylinder head overhaul * Double your service life over OEM usin...

* Save time money when purchasing this kit * One package, everything you need for a cylinder head overhaul * Double your service life over OEM usin...

* Save time money when purchasing this kit * One package, everything you need for a cylinder head overhaul * Double your service life over OEM usin...