Cylinder Heads & Components

62 products

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

$723.99

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

$447.99

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

$393.99

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...

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AVV

$393.99

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

$394.99

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

$361.99

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

$360.99

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

$360.99

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

$356.99

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

$356.99

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

$316.99

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...

$3,602.99

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...

$3,225.99

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....

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$879.99

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...

COLONY MACHINE

$209.99

Benefits & Features:- * OEM Style Chrome Head Bolts & Washers. * Machined from High Strength Steel. * Hardened to Original OEM Specifications to Prevent Stretching. * Bolts Feature Rolled ...