Bike Parts

Note: Maximum Recommended Lift = .600" * Chromium-Silicon (CrSi) valve springs are high-tensile, durable steel alloys designed for high-performance...

Note: Maximum Recommended Lift = .600" * Chromium-Silicon (CrSi) valve springs are high-tensile, durable steel alloys designed for high-performance...

In an effort to develop valve seats that would meet our exacting standards, KPMI® tested and chemically separated several iron based valve seats. E...

In an effort to develop valve seats that would meet our exacting standards, KPMI® tested and chemically separated several iron based valve seats. E...

Kit Includes: * A Full Set of KPMI Stainless Steel Black Diamond Valves (Stock Head Diameter) * All KPMI Black Diamond Stainless steel valves are i...

Kit Includes: * A Full Set of KPMI Stainless Steel Black Diamond Valves (Stock Head Diameter) * All KPMI Black Diamond Stainless steel valves are i...

Kit Includes: * A Full Set of KPMI Stainless Steel Black Diamond Valves (Stock Head Diameter) * All KPMI Black Diamond Stainless steel valves are i...

Kit Includes: * A Full Set of KPMI Stainless Steel Black Diamond Valves (Stock Head Diameter) * All KPMI Black Diamond Stainless steel valves are i...

Kit Includes: * A Full Set of KPMI Stainless Steel Black Diamond Valves (Stock Head Diameter) * All KPMI Black Diamond Stainless steel valves are i...

Kit Includes: * A Full Set of KPMI Stainless Steel Black Diamond Valves (Stock Head Diameter) * All KPMI Black Diamond Stainless steel valves are i...

Kit Includes: * A Full Set of KPMI Stainless Steel Black Diamond Valves (Stock Head Diameter) * All KPMI Black Diamond Stainless steel valves are i...

* 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...

* 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...

* 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...

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...