Cylinder Heads
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Kpmi - 20-21300 - Sprng Kit .610 Lift Evo 84-99 Tc '99-04 5/16 Stem Valves
KPMI
$184.99Kpmi - 20-21300 - Sprng Kit .610 Lift Evo 84-99 Tc '99-04 5/16 Stem ValvesFeaturesWound from Premium Kobe Super-Clean Chrome Silicon Wire. KPMI valve springs are heat-treated, stress relieved and shot peened to insure maximum performance and life...$184.99 -
Kpmi - 20-21400 - Spring Kit .610 Lift Hd Tc
KPMI
$184.99Kpmi - 20-21400 - Spring Kit .610 Lift Hd TcFeaturesWound from Premium Kobe Super-Clean Chrome Silicon Wire. KPMI valve springs are heat-treated, stress relieved and shot peened to insure maximum performance and life. Springs are engineered for each...$184.99 -
Kpmi - 20-21017H - White Diamond Exhaust Valve M8 1.284 Os
KPMI
$32.78Kpmi - 20-21017H - White Diamond Exhaust Valve M8 1.284 OsFeaturesFitment2018-2020Harley DavidsonFLHR Road King2018-2020Harley DavidsonFLHRXS Road King Special2018-2020Harley DavidsonFLHX Street Glide2018-2020Harley DavidsonFLHXS Street Glide...$32.78 -
Kpmi - 20-20915 - Black Diamond O/S Int. Valve Evo/Twin Cam `84-04
KPMI
$41.95Kpmi - 20-20915 - Black Diamond O/S Int. Valve Evo/Twin Cam `84-04FeaturesFitment1994-2004Harley DavidsonFLHR Road King1984-2004Harley DavidsonFLHTC Electra Glide Classic1989-2004Harley DavidsonFLHTCU Electra Glide Ultra Classic2002-2003Harley...$41.95 -
Kpmi - 20-20920 - Black Diamond O/S Ex. Valve Evo/Twin Cam `84-04
KPMI
$41.95Kpmi - 20-20920 - Black Diamond O/S Ex. Valve Evo/Twin Cam `84-04FeaturesAll KPMI Black Diamond® stainless steel valves are impregnated by a special German process to a depth of .002”, with a surface build up of .0002”. This “Black Diamond®” process...$41.95 -
Kpmi - 20-20925 - Black Diamond O/S Ex. Valve Evo/Twin Cam `84-04
KPMI
$41.95Kpmi - 20-20925 - Black Diamond O/S Ex. Valve Evo/Twin Cam `84-04FeaturesAll KPMI Black Diamond® stainless steel valves are impregnated by a special German process to a depth of .002”, with a surface build up of .0002”. This “Black Diamond®” process...$41.95 -
Kpmi - 20-20930 - Black Diamond O/S Ex. Valve Evo/Twin Cam `84-04
KPMI
$41.95Kpmi - 20-20930 - Black Diamond O/S Ex. Valve Evo/Twin Cam `84-04FeaturesAll KPMI Black Diamond® stainless steel valves are impregnated by a special German process to a depth of .002”, with a surface build up of .0002”. This “Black Diamond®” process...$41.95 -
Kpmi - 20-20940 - Black Diamond O/S Int. Valve Twin Cam 88-103" `05-17
KPMI
$51.95Kpmi - 20-20940 - Black Diamond O/S Int. Valve Twin Cam 88-103" `05-17FeaturesAll KPMI Black Diamond® stainless steel valves are impregnated by a special German process to a depth of .002”, with a surface build up of .0002”. This “Black Diamond®” process...$51.95 -
Kpmi - 20-21061H - White Diamond Int. Valve 1.630 O/S M8 `17-24 Non Vvt
KPMI
$31.95Kpmi - 20-21061H - White Diamond Int. Valve 1.630 O/S M8 `17-24 Non VvtFeaturesFitment2017-2019Harley DavidsonFLHTKL Electra Glide Ultra Limited Low2017-2023Harley DavidsonFLTRXS Road Glide Special2017-2022Harley DavidsonFLHR Road King2017-2019Harley...$31.95 -
Kpmi - 20-21215 - Beehive Valve Spring Kit .550 Lift M8`17-24 Non Vvt
KPMI
$332.95Kpmi - 20-21215 - Beehive Valve Spring Kit .550 Lift M8`17-24 Non Vvt$332.95 -
Kpmi - 20-24400 - Beehive Valve Spring Kit .640 Lift M8`17-24 Non Vvt
KPMI
$539.84Kpmi - 20-24400 - Beehive Valve Spring Kit .640 Lift M8`17-24 Non Vvt$539.84 -
Kpmi - 20-2053C - Guide Intake +0.003 Cast Iron Shovelhead `78-83
KPMI
$8.99Kpmi - 20-2053C - Guide Intake +0.003 Cast Iron Shovelhead `78-83$8.99 -
Kpmi - 20-2063C - Guide Exhaust +0.003 Cast Iron Shovelhead `78-83
KPMI
$8.99Kpmi - 20-2063C - Guide Exhaust +0.003 Cast Iron Shovelhead `78-83$8.99 -
Kpmi - 20-21850 - Racing Valve Spring Kit .625 Lift H.T. Steel Retainer
KPMI
$332.95Kpmi - 20-21850 - Racing Valve Spring Kit .625 Lift H.T. Steel RetainerFeaturesWound from Premium Kobe Super-Clean Chrome Silicon Wire. KPMI valve springs are heat-treated, stress relieved and shot peened to insure maximum performance and life. Springs...$332.95 -
V-Twin - 49-7676 - Indian Chief Aluminum Head Bolt Set
V-Twin Mfg
MSRP: $83.22$82.38V-Twin - 49-7676 - Indian Chief Aluminum Head Bolt SetDescriptionIndian Chief aluminum head bolt set Fits:ChiefAdditional Information OEM No.I32I0359D UOM1 - KIT ManufacturerV-Twin OriginUSA 2025 Catalog Pages825MSRP: $83.22$82.38 -
V-Twin - 49-1348 - 1936 EL Cylinder Head Set Bare
Motortechnic
MSRP: $5,001.12$4,789.07V-Twin - 49-1348 - 1936 EL Cylinder Head Set Bare Description Bare Knucklehead cylinder head set features a cast iron construction with factory casting marks. This is the exact replica of the 1936 EL models, for 61" motors. Features a black painted...MSRP: $5,001.12$4,789.07 -
V-Twin - 49-1310 - 1937-1938 EL Knucklehead Bare Cylinder Head Set
Motortechnic
MSRP: $4,778.50$4,575.89V-Twin - 49-1310 - 1937-1938 EL Knucklehead Bare Cylinder Head SetDescription1937-1938 EL bare Knucklehead head set features OEM production numbers, mc hallmark, small intake port, primer black plugs, manifold nipples and are painted with black heat...MSRP: $4,778.50$4,575.89 -
V-Twin - 49-1038 - 45 Rear Cylinder Head
V-Twin Mfg
$400.40V-Twin - 49-1038 - 45 Rear Cylinder HeadDescription45 rear cylinder head only. Fits:G 1941-1973WL 1941-1952Additional Information OEM No.379-403R UOM1 - EA ManufacturerV-Twin OriginImported$400.40 -
V-Twin - 49-1019 - WLDR Cylinder Head Set
V-Twin Mfg
$712.27V-Twin - 49-1019 - WLDR Cylinder Head Set Description Cylinder head set features special 69cc combustion chamber and accepts 18mm spark plugs and head bolts.Heads are for use on stock 45 cylinders, not the WR angled type. *NOTE: Must order head bolts...$712.27 -
V-Twin - 49-0945 - 6:1 High Compression Head Set Aluminum
V-Twin Mfg
$649.39V-Twin - 49-0945 - 6:1 High Compression Head Set AluminumDescriptionHeads have a steel insert, cast in, to accept the 18mm spark plug.Combustion champer is 10.5mm deep. Sold as a set of 2. Fits:G 1939-1973WLD 1939-1946W 1939-1952Additional Information ...$649.39 -
V-Twin - 49-0908 - 5:1 Low Compression Head Set Aluminum
V-Twin Mfg
$522.40V-Twin - 49-0908 - 5:1 Low Compression Head Set AluminumDescriptionHeads have a steel insert, cast in to accept the 18mm spark plug.Combustion chamber is 10.5mm deep. Fits:WLD 1940-1942WLDR 1940-1941WL 1947-1957Additional Information OEM No.16683-39 ...$522.40 -
V-Twin - 49-0668 - Nickel Plated Head Primer Cups
V-Twin Mfg
MSRP: $82.08$81.26V-Twin - 49-0668 - Nickel Plated Head Primer CupsDescriptionHead prime cups are for Flathead and Overhead Valve models and features a nickel plated finish, for exact applications or restoration.Includes knurled knob and valve insert. Fits:EL 1936-1938FL...MSRP: $82.08$81.26 -
V-Twin - 49-0276 - Long Headbolt
V-Twin Mfg
$19.66V-Twin - 49-0276 - Long HeadboltDescriptionLong headbolt for side valve models Fits:G 1965-1973Additional Information OEM No.14-4OMA UOM1 - SET ManufacturerV-Twin OriginUSA 2025 Catalog Pages795$19.66 -
V-Twin - 49-0055 - Indian Aluminum Head Bolt Washer
V-Twin Mfg
MSRP: $23.86$22.31V-Twin - 49-0055 - Indian Aluminum Head Bolt WasherDescriptionIndian aluminum head bolt washer Fits:Chief 1936-1953Additional Information OEM No.I37618 UOM20 - PK ManufacturerV-Twin OriginUSA 2025 Catalog Pages825MSRP: $23.86$22.31 -
V-Twin - 49-0009 - Brass Head Primer Cups
V-Twin Mfg
MSRP: $81.92$81.09V-Twin - 49-0009 - Brass Head Primer CupsDescriptionHead primer cups are for Flathead and Overhead Valve models and features a solid brass construction for exact applications or restoration.Includes knurled knob and valve insert. Fits:UL 1937-1938EL...MSRP: $81.92$81.09 -
V-Twin - 42-6175 - Lower Valve Spring Cup Set Parkerized
V-Twin Mfg
$793.82V-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...$793.82 -
V-Twin - 42-6174 - Lower Valve Spring Cup Set Parkerized
V-Twin Mfg
$793.82V-Twin - 42-6174 - Lower Valve Spring Cup Set ParkerizedDescriptionParkerized lower valve spring cup set includes 4 piece set of lower covers with oil lines and nuts attached.Kit also includes rocker cover strip set with screws and cover set with gaskets...$793.82 -
V-Twin - 42-3637 - Lower Valve Spring Cup Set Parkerized
V-Twin Mfg
$683.11V-Twin - 42-3637 - Lower Valve Spring Cup Set ParkerizedDescriptionInclude 4 piece set of lower covers with steel oil lines and nuts brazed in place and 4 piece cover set, which features a parkerized finish.Complete set for four valves include four snap...$683.11 -
V-Twin - 42-1170 - M8 Finned Spark Plug Cover Set Granite
V-Twin Mfg
MSRP: $71.37$70.65V-Twin - 42-1170 - M8 Finned Spark Plug Cover Set GraniteDescriptionGranite finned spark plug cover set for M8 models. Fits:FLT 2017-UPAdditional Information OEM No.25800062 UOM1 - SET ManufacturerV-Twin OriginImported 2025 Catalog Pages33MSRP: $71.37$70.65 -
V-Twin - 42-1160 - M8 Finned Spark Plug Cover Set Black
V-Twin Mfg
MSRP: $71.37$70.65V-Twin - 42-1160 - M8 Finned Spark Plug Cover Set BlackDescriptionBlack finned spark plug cover set for M8 models. Fits:FLT 2017-UPAdditional Information OEM No.25800061 UOM1 - SET ManufacturerV-Twin OriginImported 2025 Catalog Pages33MSRP: $71.37$70.65 -
V-Twin - 42-1157 - Head Bolt and Spark Plug Cover Kit Black
V-Twin Mfg
$60.46V-Twin - 42-1157 - Head Bolt and Spark Plug Cover Kit BlackDescriptionBlack cylinder head bolt and spark plug cover kit. Fits:XL 2004-UPAdditional Information UOM1 - KIT ManufacturerV-Twin OriginImported 2025 Catalog Pages854$60.46 -
V-Twin - 42-1156 - Head Bolt and Spark Plug Cover Kit Silver
V-Twin Mfg
$60.46V-Twin - 42-1156 - Head Bolt and Spark Plug Cover Kit SilverDescriptionSilver cylinder head bolt and spark plug cover kit. Fits:XL 2004-UPAdditional Information OEM No.44296-04 UOM1 - KIT ManufacturerV-Twin OriginImported 2025 Catalog Pages854$60.46 -
V-Twin - 42-1154 - Head Bolt and Spark Plug Cover Kit Silver
V-Twin Mfg
$60.46V-Twin - 42-1154 - Head Bolt and Spark Plug Cover Kit SilverDescriptionSilver cylinder head bolt and spark plug cover kit for carbureted models. Fits:FLST 1999-2006FXST 1999-2006FLT 1999-2006FXD 1999-2006Additional Information OEM No.43840-01 UOM1 -...$60.46 -
V-Twin - 42-1092 - Brass Cylinder Head Bolt Cover
V-Twin Mfg
$50.39V-Twin - 42-1092 - Brass Cylinder Head Bolt CoverDescriptionSolid brass cylinder head bolt cover is a four piece set. Fits:FXD 1991-2017FLST 1986-2017FXST 1984-2017FXR 1984-1994FLT 1984-2017Additional Information UOM1 - SET ManufacturerV-Twin ...$50.39 -
V-Twin - 42-0772 - Cylinder Head Locker Aluminum
V-Twin Mfg
$27.92V-Twin - 42-0772 - Cylinder Head Locker AluminumDescriptionCylinder head locker fits Big Twin 1340 models in shot peened natural aluminum. Set screws are included for installation. Fits:FXR 1986-1991FXST 1986-1991FLST 1986-1991FLT 1986-1991Additional...$27.92 -
V-Twin - 3717-16 - Cylinder Head Bolt Set 12 Point Black
Colony Machine
MSRP: $49.90$48.50V-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 OriginUSAMSRP: $49.90$48.50 -
V-Twin - 37-9399 - Cylinder Headbolt Cover Set Black
V-Twin Mfg
$36.59V-Twin - 37-9399 - Cylinder Headbolt Cover Set BlackDescription4 piece cylinder headbolt cover set features a black finish. Fits:XL 1986-UPFLST 1986-UPFXST 1986-UPFLT 1986-UPFXR 1986-UPAdditional Information UOM1 - SET ManufacturerV-Twin ...$36.59 -
V-Twin - 37-9131 - Head Bolt Cover Set Chrome
V-Twin Mfg
$30.20V-Twin - 37-9131 - Head Bolt Cover Set ChromeDescriptionChrome grooved head bolt cover set. Fits:FXD 1991-2017FLT 1986-2017XL 1986-UPFXST 1986-2017FXR 1986-1994FLST 1986-2017Additional Information OEM No.43890-93 UOM4 - SET ManufacturerV-Twin ...$30.20 -
V-Twin - 37-9019 - Head Bolt Set Chrome
V-Twin Mfg
$98.20V-Twin - 37-9019 - Head Bolt Set ChromeDescriptionChrome 12 point head bolt set Fits:FXR 1986-1991FXD 1991-1991XL 1986-1992FXST 1986-1991FLST 1986-1991FLT 1986-1991Additional Information UOM1 - KIT ManufacturerV-Twin OriginImported 2025 Catalog...$98.20 -
V-Twin - 37-8897 - Head Bolt Cover Set Dome Chrome
V-Twin Mfg
MSRP: $19.86$19.66V-Twin - 37-8897 - Head Bolt Cover Set Dome ChromeDescriptionChrome dome style head bolt cover set Fits:FXST 1984-1985FLT 1984-1985FXR 1984-1985Additional Information UOM4 - SET ManufacturerV-Twin OriginImported 2025 Catalog Pages36MSRP: $19.86$19.66
Harley Cylinder Heads
Harley cylinder heads are key to unlocking better combustion, more horsepower, and crisper throttle response. Whether you're rebuilding a vintage ride or dialing in your current setup, the right heads can completely transform your V-twin—bringing out that iconic Harley sound and strong, reliable torque.
At Deadbeat Customs, we carry Harley cylinder heads from top brands like S&S. These heads are made from premium aluminum and feature CNC-machined combustion chambers, multi-angle valve seats, and high-performance valve springs. Upgrade your motor with Harley cylinder heads that run cooler, last longer, and hit harder. Check out the collection and take your build to the next level.