Cylinder Heads & Parts - Evo

20 products

Shop the range of aftermarket motorcycle engine products at Pro Class Custom Parts.

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$587.99

* Save time money when purchasing this kit * One package, everything you need for a cylinder head overhaul * Double your service life over OEM using KPMI Valvetrain products Kit Includes: * KPMI ...

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KIBBLEWHITE

$400.99

Since 1939, KPMI® has taken great pride in our ability to design innovative performance improvements for valvetrains. This innovative ability has never been more apparent than with the development...

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KIBBLEWHITE

$380.99

By taking advantage of the latest development in valve spring wire chemistry and manufacturing techniques, KPMI® has developed ovate wire Beehive style springs that will live and perform at a high...

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KIBBLEWHITE

$376.99

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KIBBLEWHITE

$345.99

By taking advantage of the latest development in valve spring wire chemistry and manufacturing techniques, KPMI has developed ovate wire Beehive style springs that will live and perform at a high ...

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KIBBLEWHITE

$301.99

Kit Includes: * A Full Set of KPMI Stainless Steel Black Diamond Valves (Stock Head Diameter) * All KPMI Black Diamond Stainless steel valves are impregnated by a special German process to a depth...

AVV

$813.99

* Extreme Duty Valve Spring Kit – Titanium Retainers – .675″ Lift * Specifically designed & processed with extra shot peening & nitrided to resist failure under the most extreme conditions...

AVV

$449.99

Note: Maximum Recommended Lift = .650″ * Steel Double Spring Kit * Ultra pure chrome silicon+Nickle spring wire * Extra processing for fatigue resistance * 1.375″ for better clearance inside rocke...

AVV

$362.99

Note: Maximum Recommended Lift = .650″ * Beehive steel valve spring kit * Ultra pure chrome silicon+Nickle spring wire * Extra processing for fatigue resistance * Resist pressure loss & fatigu...

AVV

$361.99

Note: Maximum Recommended Lift = .600″ * Steel Double Spring Kit * Ultra pure chrome silicon+Nickle spring wire * Extra processing for fatigue resistance * 1.375″ for better clearance inside rocke...

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AVV

$358.99

Note: Maximum Recommended Lift = .600″ * Beehive steel valve spring kit * Ultra pure chrome silicon+Nickle spring wire * Extra processing for fatigue resistance * Resist pressure loss & fatigu...

$3,616.99

Features & Benefits:- * 585″ Lift. * Works with 3-1/2″ & 3-5/8″ Cylinders. * Intake ports are the same size as OEM so the HD manifold bolts on. * Works with OEM style flat top pistons. * F...

$3,238.99

Features & Benefits:- * 585″ Lift. * Heads works with 3.5″ & 3-5/8″ cylinders. * Intake ports are the same size as OEM so the H-D manifold bolts on * Works with OEM style flat top pistons....

$4,464.99

These S&S® Super Stock® cylinder heads for 1984-’99 HD® Evolution® Big Twin engines feature a specially shaped combustion chamber and require special pistons that must be purchased separately....

$475.99

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