Cylinder Heads

Colony - 9649-5 Speedometer Cable Clamp fits '39-'48 UL Model (OEM #67086-39) Speedometer Cable Clamp Fitment: UL 1939-1948

Colony - 9650-1 Speedometer Cable Clamp fits '52-'56 FL Model (OEM #67075-52) Speedometer Cable Clamp Fitment: FL 1952-1956

Colony - 12-1804 45" Head Stud Washer Set fits '29-'35 DL Model (OEM #6395) 45" head stud washer set measures 3/8" x 13/16" x 1/16". Sold as a 14 piece set Fitment: DL 1929-1935

Colony - 3515-4 Cylinder Head Bolt Spacers fits '52-'53 K Model (OEM #6860-52) Cadmium plated cylinder head bolt machined spacers fit between cylinder heads and motor mount. Sold as a 4 piece set Fitment: K 1952-1953 Measurements: Height:...

Colony - 3516-4 Cylinder Head Bolt Spacers fits '54-'56 KH Model (OEM #16860-54) Cadmium plated cylinder head bolt machined spacers fit between cylinder heads and motor mount. Sold as a set of 4 Fitment: KH 1954-1956 Measurements: Height:...

Colony - 9704-10 Parkerized Cylinder Headbolt Washer Set fits '71-'84 FX, '48-'84 FL Models Cylinder headbolt washer set with a parkerized finish Fitment: FX 1971-1984 FL 1948-1984

Colony - 9705-18-45 Parkerized Headbolt Kit fits '29-'52 WL, '29-'73 G Models  Parkerized headbolt kit with aluminum heads. Order washers separately Fitment: WL 1929-1952 G 1929-1973

Colony - 9748-16 Allen Type Headbolt Kit fits '73-'85 Sportster Models Allen type headbolt kit. Fitment: XL 1973-1985

Colony - 9759-4 Allen Type Tappet Block Screw Kit fits '91-'94 Sportster Models Tappet block allen type screw kit. Fitment: XL 1991-1994

Colony - 9761-4 Kick Starter Trip Bolt and Nut Kit fits '41-'52 WL, '41-'63 G Models (OEM #33456-26) Trip bolt and nut kit for kick starter on side valve models Fitment: WL 1941-1952 G 1941-1963 Measurements: Length: 1-1/16" Thread: 1/4"-24

Colony - 9889-16 Cadmium Headbolt Kit fits '51-'73 G, '51-'52 WL Models (OEM #16809-40) Cadmium headbolt kit, stock for side valve models  Fitment: G 1951-1973 WL 1951-1952

V-Twin - Cylinder Head Set with Chrome Rocker Box fits '78-'84 FL/FX Models Set is assembled with cast iron guides, valve stem seals, chrome rocker box and nitrated valves. For use on 74" or 80" models with Shovelhead barrels Fitment: FL...

Colony - 7711-18 Cadmium Cylinder Headbolt fits '31-'36 V, '37-'48 U Models Cadmium cylinder headbolt for use on 74" and 80" Side Valve motors with aluminum heads Fitment: V 1931-1936 U 1937-1948

Colony - 7711-18-45 Cadmium Headbolt fits '29-'52 WL, '29-'73 G Models Cadmium headbolt, stock with aluminum heads for 45" side valve models Order washers separately Fitment: WL 1929-1952 G 1929-1973

Colony - 7712-36 Cadmium Headbolt fits '29-'52 WL, '29-'73 G Models Cadmium headbolt for side valve models. Fitment: WL 1929-1952 G 1929-1973

Colony - 7713-20 Cadmium Stock 61" Cylinder Head Bolt fits '36-'39 EL Model Cadmium 61" cylinder head bolt Fitment: EL 1936-1939

Colony - 7714-20 Cadmium Stock Cylinder Head Bolt fits '40-'47 FL Model Cadmium stock cylinder head bolt Fitment: FL 1940-1947

Colony - Head Bolt Kit fits '48-'84 Big Twin Models (OEM #16814-40, 6469) Features: Hardened to OEM specifications to prevent stretching Made in the U.S.A. Fitment 1977 Harley-Davidson 1200 Low Rider...

Feuling - Headbolt Kit fits '17-'22 M8 Models (3.125" Under Head Length) This kit features wide underhead flange bolts and hardened chamfered washers that provide even load distribution for the utmost surface sealing to prevent leaks. There are...

S&S Cycle - Retro Top-End Conversion Kit for 3.625" Bore Cylinders fits '66-'84 Shovelhead Engines Your Shovelhead will achieve the ultimate blast-from-the-past appearance of a Panhead with this Retro Top-End Conversion Kit from S&S Cycle! It...

S&S Cycle - Retro Top-End Conversion Kit for Stock Bore Cylinders fits '66-'84 Shovelhead Engines Your Shovelhead will achieve the ultimate blast-from-the-past appearance of a Panhead with this Retro Top-End Conversion Kit from S&S Cycle! It...

S&S Cycle - Super Stock™ '66-'78 Cylinder Heads - fits 3-5/8" Bore Cylinders Features: Heads come completely assembled with valve seats, valves, guides, seals, .590" lift valve springs, collars and valve keepers Complete kits also include...

S&S Cycle - Wrinkle Black Powdercoat 91cc Super Stock™ Cylinder Heads fits '06-'17 Twin Cam Models (Exc. Twin Cooled Motors) S&S Cycle's 91cc Super Stock™ Cylinder Heads' high port flow creates excellent performance after initial...

S&S Cycle - Silver Powdercoat 79cc Super Stock™ Cylinder Heads fits '99-'05 Twin Cam Models S&S Cycle's 79cc Super Stock™ Cylinder Heads' high port flow creates excellent performance after initial installation, and even greater...

S&S Cycle - Wrinkle Black Powdercoat 79cc Super Stock™ Cylinder Heads fits '06-'17 Twin Cam Models (Exc. Twin Cooled Motors) S&S Cycle's 79cc Super Stock™ Cylinder Heads' high port flow creates excellent performance after initial...

S&S Cycle - Wrinkle Black Powdercoat 89cc Super Stock™ Cylinder Heads fits '06-'17 Twin Cam Models (Exc. Twin Cooled Motors) S&S Cycle's 89cc Super Stock™ Cylinder Heads' high port flow creates excellent performance after initial...

S&S Cycle - Super Stock™ Single Spark Plug Cylinder Heads - fits '79-'84 (Rubber Band Intake) 3 ⅜" Bore Cylinders Heads come completely assembled with valve seats, valves, guides, seals, .590" lift valve springs, collars and valve...

S&S Cycle - Wrinkle Black Powdercoat 79cc Super Stock™ Cylinder Heads fits '99-'05 Twin Cam Models (.585" Lift) S&S Cycle's 79cc Super Stock™ Cylinder Heads' high port flow creates excellent performance after initial installation,...

S&S Cycle - 76cc High Compression Performance Cylinder Heads fits '84-'99 Evolution Big Twin Models - Black Powdercoat Great news: S&S heads are now available to be used with stock-style flat-top pistons! The kits are fully assembled and come...

S&S Cycle - Super Stock™ Dual Spark Plug Cylinder Heads - fits '79-'84 (Rubber Band Intake) 3 ⅜" Bore Cylinders Heads come completely assembled with valve seats, valves, guides, seals, .590" lift valve springs, collars and valve...

Colony - 9212-16 Cadmium Headbolt Kit fits '73-'85 Sportster Models Headbolt kit with a cadmium finish. Fitment: XL 1973-1985

S&S Cycle - Silver Powdercoat 79cc Super Stock™ Cylinder Heads fits '06-'17 Twin Cam Models (Exc. Twin Cooled Motors) S&S Cycle's 79cc Super Stock™ Cylinder Heads' high port flow creates excellent performance after initial...

S&S Cycle - Silver Powdercoat 89cc Super Stock™ Cylinder Heads fits '99-'05 Twin Cam Models S&S Cycle's 89cc Super Stock™ Cylinder Heads' high port flow creates excellent performance after initial installation, and even greater...

V-Twin - 49-1350 - Knucklehead Bare Cylinder Head SetDescriptionKnuckle bare cylinder head set is painted black with large port heads. Fits:EL 1940-1947Additional Information UOM1 - SET ManufacturerMotortechnic OriginImported 2025 Catalog Pages515

V-Twin - 49-0909 - Head Set AluminumDescriptionFront and rear aluminum heads for 74" and 80" side valve models. Fits:U 1936-1948Additional Information OEM No.16670-36F UOM2 - SET ManufacturerV-Twin OriginImported 2025 Catalog Pages795

V-Twin - 42-6175 - Lower Valve Spring Cup Set ParkerizedDescriptionLower valve spring cup set includes 4 piece set of parkerized lower valve spring cups and chrome covers with oil lines and nuts attached.Kit also includes rocker cover strip set with...

V-Twin - 3717-16 - Cylinder Head Bolt Set 12 Point BlackDescriptionBlack oxide 12 point cylinder head bolt kit includes washers. Fits:XLCH 1973-1985XLH 1973-1985Additional Information UOM1 - SET ManufacturerColony OriginUSA

V-Twin - 37-4050 - Head Screw Description Head screw, 10/24 X 3/8 Fits: FX 1971-1984 FL 1941-1984 Additional Information UOM 10 - PK Manufacturer V-Twin Origin USA 2025 Catalog Pages 485

V-Twin - 3648-16 - Stock Head Bolt Kit Cadmium PlatedDescriptionStock head bolt kit features a cadmium plated finish. Fits:XLH 1967-1972XL 1957-1972XLCH 1971-1972Additional Information UOM1 - KIT ManufacturerColony OriginUSA

V-Twin - 3619-1 - Cylinder Head Bracket ParkerizedDescriptionCast iron cylinder head bracket features a parkerized finish. Fits:G 1932-1950WL 1932-1950Additional Information OEM No.2806-32 UOM1 - EA ManufacturerColony OriginUSA