Collection:
Cylinder Heads & Parts - Vintage
6 productsShop the range of aftermarket motorcycle engine products at Pro Class Custom Parts.
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Brakes
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Brake Upgrades - Front
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Cables & Hyd. Lines - Black
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Cables & Hyd. Lines - Chromite
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Exhaust Headers
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Exhaust System 2:1
- Breakout (2:1)
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- Honda (2:1)
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- Yamaha (2:1)
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Exhaust System 2:2
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Spare Parts - Foot Brake
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Spare Parts - Foot Shift
Fuel & Air Systems
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Air Cleaner Kits & Components
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Carburettor Kits & Components
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Fuel - Taps & Lines & Filters
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Inlet Manifolds & Clamps etc
Gasket Kits & Gaskets & Seals
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Gaskets Complete Engine Kits
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Gaskets Primary
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Gaskets Top End & Rocker
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Gaskets Transmission
Handlebars & Controls
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Handlebars & Risers H-D
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- Risers 1-1/4" Clamp - Black
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- Risers 1-1/8" Clamp - Black
- Risers 1-1/8" Clamp - Chrome
- Handlebars & Risers Indian
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Mirrors
Instruments & Gauges
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Gauges - Bagger & Dresser
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Oil+Volt+Temp & Other Gauges
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Speedo 3-3/8" Tank & Bar MT
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Speedo 4.5" Tank Mt 1936-03
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Speedo 4.5" Tank Mt 2004up
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Speedo Dash's & Bases & Other
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Speedos & Mts Custom App.
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Pillion Pads
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Sissy Bar Side Straps
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Solo Seats
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- Touring (FLH) 1991-2007 Solo Seats
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- Touring (FLH) 2024up Solo Seats
- Vintage(1936-84) Solo Seats
Suspension
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FXR
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Front Susp. Related
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Front Suspension: 35 & 39mm
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Front Suspension: 41mm
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Front Suspension: 49mm
- Rear Shocks Related - Universal
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Rear Shocks: Dyna
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Rear Shocks: FLH
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Rear Shocks: HD Street
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Rear Shocks: HD Trike
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Rear Shocks: Indian & Victory
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Rear Shocks: Metric
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Rear Shocks: Softail
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Rear Shocks: V-Rod
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Rear Shocks: Vintage
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Rear Shocks: XL'04up
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Universal Suspension
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XL'79-03
Tires & Wheels
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Arlen Ness Wheels
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Axles & Related Components
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OEM Wheels & repl Components
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Performance Machine Wheels
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Renegade Wheels
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Spoke Wheels
Tools & Supplies
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General Workshop Equipment
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Harley-Davidson Specific Tools
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Indian & Victory Tools
Transmission & Final Drive
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Final Drive
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Transmission - BT 4 spd era
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Transmission - BT 5 spd era
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Transmission - BT 6 spd era
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Transmission - XL 4 spd era
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Transmission - XL 5 spd era
Windshields & Luggage
Stock Head Bolts – Chrome. Fits Pan & Shovel 1948-1984.
Regular price
$200.99
Sale price
$200.99
Regular price
Unit price
/per
Benefits & Features:-
* OEM Style Chrome Head Bolts & Washers.
* Machined from High Strength Steel.
* Hardened to Original OEM Specifications to Prevent Stretching.
* Bolts Feature Rolled ...
Valve Spring Kit. Fits Big Twin 1948-1984. .590in. Lift
Regular price
$340.99
Sale price
$340.99
Regular price
Unit price
/per
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...
Sold Out
Valve Spring Kit. Fits Big Twin 1948-1984. .530in. Lift
Regular price
$340.99
Sale price
$340.99
Regular price
Unit price
/per
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...
Valve Spring Kit. Fits Big Twin 1948-1984. .470in. Lift.
Regular price
$340.99
Sale price
$340.99
Regular price
Unit price
/per
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...
ARP Head Bolts – Stainless Steel. Fits Pan & Shovel 1948-1984.
Regular price
$297.99
Sale price
$297.99
Regular price
Unit price
/per
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...
Cylinder Head Kit- Natural. Fits Big Twin 1966-1984, Stock Bore.
Regular price
$3,996.99
Sale price
$3,996.99
Regular price
Unit price
/per
Features & Benefits:-
* Fitment to H-D 1966-1978 models will require upgrade to the 1979-1984 style inlet manifold rubbers & clamps.
* .590′ Lift.
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