Engine

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...

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...

* 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 seal...

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 ...

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

* KPMI Compression Release valves are state of the art and priced competitively * Designed to reduce "hot start" issues and starter / battery loads...

These S&S® Super Stock® cylinder heads for 1984-'99 HD® Evolution® Big Twin engines feature a specially shaped combustion chamber and require s...

Features & Benefits:- * For S&S Compression Release Kits. * 1.500" Length * Sold Each. Proudly Made in the USA by S&S Cycle !

Features & Benefits:- * Fits Twin Cam with S&S Heads. * Fits Evo 4" & 4-1/8" Bore Engines with S&S Heads. * Must be used in conjunc...

* Highest flow level on the market. * One piece forged racing grade stainless steel alloy. * hard black nitride finish. * bearing quality hardened...

* Extreme Duty Valve Spring Kit - Titanium Retainers - .675" Lift * Specifically designed & processed with extra shot peening & nitrided to...

Note: Maximum Recommended Lift = .650" * Beehive steel valve spring kit * Ultra pure chrome silicon+Nickle spring wire * Extra processing for fatig...

Note: Maximum Recommended Lift = .650" * Steel Double Spring Kit * Ultra pure chrome silicon+Nickle spring wire * Extra processing for fatigue resi...

Note: Maximum Recommended Lift = .600" * Steel Double Spring Kit * Ultra pure chrome silicon+Nickle spring wire * Extra processing for fatigue resi...

Note: Maximum Recommended Lift = .600" * Beehive steel valve spring kit * Ultra pure chrome silicon+Nickle spring wire * Extra processing for fatig...

FEULING ECONO performance BEEHIVE valve springs designed to handle up to 585 lift camshafts at an economical price. These FEULING BEEHIVE springs a...

Features & Benefits:- * Replacement intake valve for S&S Super Stock heads. * Fits Big Twin 1984up, Sportster 1986-2003 & S&S X-Wed...

* Highest flow level on the market. * One piece forged racing grade stainless steel alloy. * Hard black nitride finish. * Bearing quality hardened...

* Stock length & head diameter * Extreme Duty * High Flow * one piece forged racing grade stainless steel alloy. * Liquid nitriding process cr...

* Highest flow level on the market. * One piece forged racing grade stainless steel alloy. * hard black nitride finish. * bearing quality hardened...

Features & Benefits:- * Replacement intake valve for S&S Super Stock Heads. * Fits Big Twin 1984up, Sportster 1986-2003 & S&S X-Wed...

* Highest flow level on the market. * One piece forged racing grade stainless steel alloy. * hard black nitride finish. * bearing quality hardened...

* Stock length & head diameter * Extreme Duty * High Flow * one piece forged racing grade stainless steel alloy. * Liquid nitriding process cr...

Tech Tips: Thickness .015" OD= 1.480" ID= .600" Sold as a pack of 20 This Valve Spring Shim allows the engine builder to adjust spring pressure b...

* Resists Higher temp than other Viton seals * Use on Evo & TC'84-04, XL & Buell'86-04 * Use with AV-VG5600 / 5700 Series .530" valve guid...

* Resists higher temp than other viton seals * Use on Evo & TC'84-04, XL & Buell'86-04 * Use with AV-VG5600/VG5700 series valve guides * R...

* Inside Diameter = .421". * Resists higher temp than other viton seals * Use on Evo & TC'84-04, XL & Buell'86-04 * Use with AV-VG5600S/VG...

* Inside Diameter = .420 * Resists higher temp than other viton seals * Use on Evo & TC'84-04, XL & Buell'86-04 * Use with AV-VG5600S/VG57...

Features & Benefits:- * Includes white silicone cap. Proudly Made in the USA by S&S Cycle !

Features & Benefits:- * 14mm Plugs. * Sold as a Pack (2). Proudly Made in the USA by S&S Cycle !

* Short protrusion - short thread * Shorter thread sections make installation easier with less drilling required than OE style * High temp resistan...

* Designed for Harley-Davidson heads * Use with .420 Viton # AV-V312420B or OEM valve seals * Manganese-Bronze * .050" shorter for high lift &...

* Use with .530 Viton valve seals # AV-V312530 * Manganese-Bronze * .050" shorter seal area for high lift applications * Profiled for optimum airfl...

* Use with .530 Viton valve seals # AV-V312530 * Manganese-Bronze * .050" shorter seal area for high lift applications * Profiled for optimum airfl...

* Use with .530 Viton valve seals # AV-V312530 * Manganese-Bronze * .050" shorter seal area for high lift applications * Profiled for optimum airfl...

* Use with .530 Viton valve seals # AV-V312530 * Manganese-Bronze * .050" shorter seal area for high lift applications * Profiled for optimum airfl...

* Designed for Harley-Davidson heads * Use with .420 Viton # AV-V312420B or OEM valve seals * Manganese-Bronze * .050" shorter seal area for high ...

* Use with .530 Viton valve seals # AV-V312530 * Manganese-Bronze * .050" shorter seal area for high lift applications * Profiled for optimum airfl...

* Designed for Harley-Davidson heads * Use with .420 Viton # AV-V312420B or OEM valve seals * Manganese-Bronze * .050" shorter seal area for high ...

* Use with .530 Viton valve seals # AV-V312530 * Manganese-Bronze * .050" shorter seal area for high lift applications * Profiled for optimum airfl...