Cylinder Heads & Components

63 products

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

$860.99

* 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

$767.99

Features & Benefits * Works well with cams up to .615″ lift * High Performance conical single wire spring * Kit Includes: Springs, Top Collars, Keepers, Bottom Collare/Seals Suggested Additio...

AVV

$476.99

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...

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AVV

$414.99

Note: Maximum Recommended Lift = .530″ * High Performance Spring Kit * Silicon & Vanadium alloy spring wire * Increased travel before coil bind * Complete Kit includes: springs, retainers, kee...

AVV

$414.99

Note: Maximum Recommended Lift = .470″ * High Performance Spring Kit * Silicon & Vanadium alloy spring wire * Increased travel before coil bind * Complete Kit includes: springs, retainers, kee...

AVV

$415.99

Note: Maximum Recommended Lift = .590″ * High Performance Spring Kit * Silicon & Vanadium alloy spring wire * Increased travel before coil bind * Complete Kit includes: springs, retainers, kee...

AVV

$379.99

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

$378.99

Note: Maximum Recommended Lift = .650″ * Beehive steel valve spring kit * Use with AV-V7MMB guide seals * Fits both Single & Triple groove valves * Ultra pure chrome silicon+Nickle spring wire...

AVV

$378.99

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...

AVV

$374.99

Note: Maximum Recommended Lift = .600″ * Beehive steel valve spring kit * Use with OEM style AVV guide seals * Fits both Single & Triple groove valves * Ultra pure chrome silicon+Nickle spring...

AVV

$374.99

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...

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FEULING

$335.99

Benefits & Features:- * Quality hex head, hardened stainless steel bolts with a SHOW polish and corrosion-resistant finish * Tensile strength rated @ 180,000 psi – Superior & Stronger than...

$3,617.99

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...

$3,361.99

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....

$912.99

Features & Benefits:- * Works well with cams up to .605″ lift. * High Performance conical single wire spring. * Kit Includes Springs, Top Collars, Keepers, Bottom Collars & Seals. Suggeste...