Engine
137 parts
Harley engine parts for Evo, Twin Cam, Milwaukee-Eight and Sportster motors. Jump to cams, big bore kits, heads, gaskets and seals or engine covers. Free US shipping over $100.
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S&S Cycle - 09040135 - Power Pack - 4.375" Stroke - Oil Cooled - Black Granite w/Highlights - M8
S&S Cycle
$3,294.95S&S CYCLE - 09040135 - Power Pack - 4.375" Stroke - Oil Cooled - Black Granite w/Highlights - M8FeaturesBolt-on kitWith updated finsNo case machining requiredForged pistonsMade in the USAIncludes oil...$3,294.95 -
S&S Cycle - 09040131 - Power Pack - 4.500" Stroke - Oil Cooled - Black w/o Highlights - M8
S&S Cycle
$3,294.95S&S CYCLE - 09040131 - Power Pack - 4.500" Stroke - Oil Cooled - Black w/o Highlights - M8Features114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kitBolt-in kit, case maching not...$3,294.95 -
S&S Cycle - 09040130 - Power Pack - 4.500" Stroke - Oil Cooled - Black w/Highlights - M8
S&S Cycle
$3,294.95S&S CYCLE - 09040130 - Power Pack - 4.500" Stroke - Oil Cooled - Black w/Highlights - M8Features114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kitBolt-in kit, case maching not...$3,294.95 -
V-Twin - 10-0942 - 1936 61 inch Knucklehead Engine Case Set
Motortechnic
$3,755.65V-Twin - 10-0942 - 1936 61 inch Knucklehead Engine Case SetDescriptionFor 61" Knucklehead motors accurately cast and machined by Motortechnic in Germany. Features a natural cast finish and a blank...$3,755.65 -
S&S Cycle - 310-1226 - 129" Power Package Engine Performance Kit - Chain Drive - Oil Cooled - Non-Highlighted Fins - M8
S&S Cycle
$3,359.95S&S Cycle - 310-1226 - 129" Power Package Engine Performance Kit - Chain Drive - Oil Cooled - Non-Highlighted Fins - M8FeaturesTransform 107" oil-cooled M8 into 129" with no case machining...$3,359.95 -
S&S Cycle - 91-7661 - 96" Sidewinder® - 3.625" Big Bore - Stroker Kit - Wrinkle Black - Evolution Big Twin
S&S Cycle
$2,879.95S&S Cycle - 91-7661 - 96" Sidewinder® - 3.625" Big Bore - Stroker Kit - Wrinkle Black - Evolution Big TwinFeaturesKit includes standard flywheel assembly, 3.625" Sidewinder® stroker big bore...$2,879.95 -
S&S Cycle - 91-7660 - 96" Sidewinder® - 3.625" Big Bore - Stroker Kit - Natural - Evolution Big Twin
S&S Cycle
$2,879.95S&S Cycle - 91-7660 - 96" Sidewinder® - 3.625" Big Bore - Stroker Kit - Natural - Evolution Big TwinFeaturesKit includes standard flywheel assembly, 3.625" Sidewinder® stroker big bore cylinder, 9...$2,879.95 -
S&S Cycle - 100" Power Packages fits '99-'06 Twin Cam Engines (Exc. '06 Dynas)
S&S Cycle
$3,396.95S&S Cycle - 100" Power Packages fits '99-'06 Twin Cam Engines (Exc. '06 Dynas) S&S Cycle has created the largest big-bore kits available today, without doing crankcase mods! This kit increases...$3,396.95 -
Out of stock
S&S Cycle - 128" Power Packages fits '17-'21 M8 Oil-Cooled Engines
S&S Cycle
$3,359.95 - $3,460.95S&S Cycle - 128" Power Packages fits '17-'20 M8 Oil-Cooled Engines This Power Package increases your 114"/117" with a 4-1/2" stroke M8 to 128". It is available in a wrinkle black or black granite...$3,359.95 - $3,460.95 -
Out of stock
S&S Cycle - 124" Power Packages fits '17-'21 M8 Oil-Cooled Engines
S&S Cycle
$2,699.95 - $3,359.95S&S Cycle - 124" Power Packages fits '17-'20 M8 Oil-Cooled Engines This bolt-on Power Package increases your 107" M8 Engine to 124". It comes in a wrinkle black finish and is available with or...$2,699.95 - $3,359.95 -
Out of stock
S&S Cycle - 09040167 - 129" Power Pack - 550 Chain Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - M8
S&S Cycle
MSRP: $3,359.95$3,294.95S&S CYCLE - 09040167 - 129" Power Pack - 550 Chain Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - M8Features550 lift for the ideal combination of horse power and torquePowder coat finish...MSRP: $3,359.95$3,294.95 -
Out of stock
S&S Cycle - 09040165 - 129" Power Pack - 550 Chain Drive - Oil Cooled - Wrinkle Black w/o Highlight Fins - M8
S&S Cycle
MSRP: $3,359.95$3,294.95S&S CYCLE - 09040165 - 129" Power Pack - 550 Chain Drive - Oil Cooled - Wrinkle Black w/o Highlight Fins - M8Features550 lift for the ideal combination of horse power and torquePowder coat finish...MSRP: $3,359.95$3,294.95 -
Out of stock
S&S Cycle - 09040164 - 132" Power Pack - 550 Chain Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - M8
S&S Cycle
MSRP: $3,359.95$3,294.95S&S CYCLE - 09040164 - 132" Power Pack - 550 Chain Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - M8Features550 lift for the ideal combination of horse power and torquePowder coat finish...MSRP: $3,359.95$3,294.95 -
Out of stock
S&S Cycle - 09040155 - 132" Power Pack - 550 Gear Drive - Oil Cooled - Black w/o Highlight Fins - M8
S&S Cycle
MSRP: $3,559.95$3,497.95S&S CYCLE - 09040155 - 132" Power Pack - 550 Gear Drive - Oil Cooled - Black w/o Highlight Fins - M8Features550 lift for the ideal combination of horse power and torquePowder coat finish matched to...MSRP: $3,559.95$3,497.95 -
Out of stock
S&S Cycle - 09040145 - Power Pack - 4.375" Stroke - Water Cooled - Black w/Highlights - M8
S&S Cycle
$3,294.95S&S CYCLE - 09040145 - Power Pack - 4.375" Stroke - Water Cooled - Black w/Highlights - M8FeaturesBolt-on kitWith updated finsNo case machining requiredForged pistonsMade in the USAIncludes oil...$3,294.95 -
Out of stock
S&S Cycle - 09040144 - Power Pack - 4.500" Stroke - Water Cooled - Black w/Highlights - M8
S&S Cycle
$3,497.95S&S CYCLE - 09040144 - Power Pack - 4.500" Stroke - Water Cooled - Black w/Highlights - M8Features114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kitBolt-in kit, case maching not...$3,497.95 -
Out of stock
S&S Cycle - 09040133 - Power Pack - 4.500" Stroke - Oil Cooled - Black w/Highlights - M8
S&S Cycle
$3,497.95S&S CYCLE - 09040133 - Power Pack - 4.500" Stroke - Oil Cooled - Black w/Highlights - M8Features114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kitBolt-in kit, case maching not...$3,497.95 -
Out of stock
S&S Cycle - 09040134 - Power Pack - 4.500" Stroke - Oil Cooled - Black w/o Highlights - M8
S&S Cycle
$3,497.95S&S CYCLE - 09040134 - Power Pack - 4.500" Stroke - Oil Cooled - Black w/o Highlights - M8Features114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kitBolt-in kit, case maching not...$3,497.95 -
Out of stock
S&S Cycle - 09040132 - Power Pack - 4.500" Stroke - Oil Cooled - Black Granite w/Highlights - M8
S&S Cycle
$3,497.95S&S CYCLE - 09040132 - Power Pack - 4.500" Stroke - Oil Cooled - Black Granite w/Highlights - M8Features114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kitBolt-in kit, case maching not...$3,497.95 -
Out of stock
S&S Cycle - 09040129 - Power Pack - 4.500" Stroke - Oil Cooled - Black Granite w/Highlights - M8
S&S Cycle
$3,265.95S&S CYCLE - 09040129 - Power Pack - 4.500" Stroke - Oil Cooled - Black Granite w/Highlights - M8Features114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kitBolt-in kit, case maching not...$3,265.95 -
Out of stock
V-Twin - 11-1297 - Knucklehead Cylinder Head Set
Motorshop
$3,853.31V-Twin - 11-1297 - Knucklehead Cylinder Head SetDescriptionKnucklehead cylinder head set features original cast iron construction with a black finish. Head set includes valves, springs, collars and...$3,853.31 -
Out of stock
V-Twin - 11-0864 - Cylinder Head Set With Rocker Assembly
Motorshop
$3,475.18V-Twin - 11-0864 - Cylinder Head Set With Rocker AssemblyDescriptionKnucklehead cylinder head set features original cast iron with natural finish. Head set includes valves, springs, collars, and...$3,475.18 -
Out of stock
V-Twin - 10-0954 - Panhead Engine Case Set
Motortechnic
$3,479.77V-Twin - 10-0954 - Panhead Engine Case SetDescriptionPanhead engine case set is accurately cast and machined to give the look of the original case set.Case set is designed for replacement of the...$3,479.77 -
Out of stock
S&S Cycle - 310-1052B - 124" Power Package - Chain Drive - Highlighted Fins - Chrome Pushrod Tubes - 107" M8
S&S Cycle
MSRP: $3,265.95$3,109.95S&S Cycle - 310-1052B - 124" Power Package - Chain Drive - Highlighted Fins - Chrome Pushrod Tubes - 107" M8FeaturesMade in the USABig Bore Kit107" to 124" Big bore kitBolt on kitNo case matching...MSRP: $3,265.95$3,109.95 -
Out of stock
S&S Cycle - 310-1050B - 124" Power Package - Chain Drive - Highlighted Fins - Chrome Pushrod Tubes - 107" M8
S&S Cycle
MSRP: $3,265.95$3,109.95S&S Cycle - 310-1050B - 124" Power Package - Chain Drive - Highlighted Fins - Chrome Pushrod Tubes - 107" M8FeaturesMade in the U.S.A.Big Bore Kit107" to 124" Big bore kitBolt on kit.No case...MSRP: $3,265.95$3,109.95 -
Out of stock
S&S Cycle - 310-1109B - 128" Power Package - Chain Drive - Black Granite with Highlighted Fins - 114"/117" M8
S&S Cycle
MSRP: $3,265.95$3,169.95S&S Cycle - 310-1109B - 128" Power Package - Chain Drive - Black Granite with Highlighted Fins - 114"/117" M8FeaturesMade in the USABig Bore KitBig-bore bolt-on kit increases 114"/117" with 4-1/2"...MSRP: $3,265.95$3,169.95 -
Out of stock
S&S Cycle - 310-1110A - 128" Power Package - Gear Drive - Black Granite with Highlighted Fins - 114"/117" M8
S&S Cycle
$3,460.95S&S Cycle - 310-1110A - 128" Power Package - Gear Drive - Black Granite with Highlighted Fins - 114"/117" M8FeaturesMade in the USABig Bore KitBig-bore bolt-on kit increases 114"/117" with 4-1/2"...$3,460.95 -
Out of stock
S&S Cycle - 310-1103B - 128" Power Package - Chain Drive - Wrinkle Black with Highlighted Fins - 114"/117" M8
S&S Cycle
MSRP: $3,265.95$3,169.95S&S Cycle - 310-1103B - 128" Power Package - Chain Drive - Wrinkle Black with Highlighted Fins - 114"/117" M8FeaturesMade in the USABig Bore KitBig-bore bolt-on kit increases 114"/117" with 4-1/2"...MSRP: $3,265.95$3,169.95 -
Out of stock
S&S Cycle - 310-1056B - 124" Power Package - Chain Drive - Highlighted Fins - Black Pushrod Tubes - 107" M8
S&S Cycle
MSRP: $3,265.95$3,109.95S&S Cycle - 310-1056B - 124" Power Package - Chain Drive - Highlighted Fins - Black Pushrod Tubes - 107" M8FeaturesMade in the USABig Bore Kit107" to 124" Big bore kitBolt on kitNo case matching...MSRP: $3,265.95$3,109.95 -
Out of stock
S&S Cycle - 310-1054B - 124" Power Package - Chain Drive - Highlighted Fins - Black Pushrod Tubes - 107" M8
S&S Cycle
MSRP: $3,265.95$3,169.95S&S Cycle - 310-1054B - 124" Power Package - Chain Drive - Highlighted Fins - Black Pushrod Tubes - 107" M8FeaturesMade in the U.S.A.Big Bore Kit107" to 124" Big bore kitBolt on kit.No case machining...MSRP: $3,265.95$3,169.95 -
Out of stock
S&S Cycle - 310-1105B - 128" Power Package - Chain Drive - Wrinkle Black with Non-Highlighted Fins - 114"/117" M8
S&S Cycle
MSRP: $3,265.95$3,109.95S&S Cycle - 310-1105B - 128" Power Package - Chain Drive - Wrinkle Black with Non-Highlighted Fins - 114"/117" M8FeaturesMade in the USABig Bore KitBig-bore bolt-on kit increases 114"/117" with...MSRP: $3,265.95$3,109.95 -
Out of stock
S&S Cycle - 310-1059A - 124" Power Package - Gear Drive - Non-Highlighted Fins - Black Pushrod Tubes - 107" M8
S&S Cycle
MSRP: $3,695.95$3,289.95S&S Cycle - 310-1059A - 124" Power Package - Gear Drive - Non-Highlighted Fins - Black Pushrod Tubes - 107" M8FeaturesMade in the USABig Bore Kit107" to 124" Big bore kitBolt on kitNo case matching...MSRP: $3,695.95$3,289.95 -
Out of stock
S&S Cycle - 310-1104A - 128" Power Package - Gear Drive - Wrinkle Black with Highlighted Fins - 114"/117" M8
S&S Cycle
MSRP: $3,460.95$3,359.95S&S Cycle - 310-1104A - 128" Power Package - Gear Drive - Wrinkle Black with Highlighted Fins - 114"/117" M8FeaturesMade in the USABig Bore KitBig-bore bolt-on kit increases 114"/117" with 4-1/2"...MSRP: $3,460.95$3,359.95 -
Out of stock
S&S Cycle - 310-1058A - 124" Power Package - Gear Drive - Highlighted Fins - Black Pushrod Tubes - 107" M8
S&S Cycle
MSRP: $3,460.95$3,359.95S&S Cycle - 310-1058A - 124" Power Package - Gear Drive - Highlighted Fins - Black Pushrod Tubes - 107" M8 Features Made in the USA Big Bore Kit 107" to 124" Big bore kit Bolt on kit No case...MSRP: $3,460.95$3,359.95 -
Out of stock
S&S Cycle - 310-1055A - 124" Power Package - Gear Drive - Highlighted Fins - Black Pushrod Tubes - 107" M8
S&S Cycle
$3,427.95S&S Cycle - 310-1055A - 124" Power Package - Gear Drive - Highlighted Fins - Black Pushrod Tubes - 107" M8FeaturesMade in the U.S.A.Big Bore Kit107" to 124" Big bore kitBolt on kit.No case machining...$3,427.95 -
Out of stock
S&S Cycle - 310-1053A - 124" Power Package - Gear Drive - Highlighted Fins - Chrome Pushrod Tubes - 107" M8
S&S Cycle
MSRP: $3,460.95$3,359.95S&S Cycle - 310-1053A - 124" Power Package - Gear Drive - Highlighted Fins - Chrome Pushrod Tubes - 107" M8FeaturesMade in the USABig Bore Kit107" to 124" Big bore kitBolt on kitNo case matching...MSRP: $3,460.95$3,359.95 -
Out of stock
S&S Cycle - 310-1326 - Crankcase - MK-Series "B" - Black - M8 Softail
S&S Cycle
$2,849.95S&S Cycle - 310-1326 - Crankcase - MK-Series "B" - Black - M8 SoftailFeaturesStock deck heightLarge volume sumpMachined, close-fitting oil scraper (stock is as cast)A solid foundation for building a...$2,849.95 -
Out of stock
S&S Cycle - 310-1227 - 129" Power Package Engine Performance Kit - Gear Drive - Oil Cooled - Highlighted Fins - M8
S&S Cycle
MSRP: $3,559.95$3,359.95S&S Cycle - 310-1227 - 129" Power Package Engine Performance Kit - Gear Drive - Oil Cooled - Highlighted Fins - M8FeaturesTransform 107" oil-cooled M8 into 129" with no case machining requiredBig...MSRP: $3,559.95$3,359.95 -
Out of stock
S&S Cycle - 310-1228 - 129" Power Package Engine Performance Kit - Gear Drive - Oil Cooled - Non-Highlighted Fins - M8
S&S Cycle
MSRP: $3,559.95$3,359.95S&S Cycle - 310-1228 - 129" Power Package Engine Performance Kit - Gear Drive - Oil Cooled - Non-Highlighted Fins - M8FeaturesTransform 107" oil-cooled M8 into 129" with no case machining requiredBig...MSRP: $3,559.95$3,359.95 -
Out of stock
S&S Cycle - 310-1238 - 132" Power Package Engine Performance Kit - Chain Drive - Oil Cooled - Highlighted Fins - M8
S&S Cycle
MSRP: $3,559.95$3,359.95S&S Cycle - 310-1238 - 132" Power Package Engine Performance Kit - Chain Drive - Oil Cooled - Highlighted Fins - M8FeaturesTransform the 114" or the 117" oil-cooled M8 into 132"Adjustable pressure...MSRP: $3,559.95$3,359.95
About Engine
Harley Engine Parts for Rebuilds and Performance
From a fresh gasket set to a full big bore build, we stock the Harley engine parts you need to rebuild, maintain or wake up your motor. Match parts to your engine: Evo, Twin Cam, Milwaukee-Eight and Sportster parts don't swap across.
Shop Engine Parts
- Camshafts
- Big bore kits
- Cylinders
- Heads
- Pushrods
- Lifters
- Rockers
- Gaskets & seals
- Oil pumps
- Oil filters
- Motor mounts
- Engine covers
We carry engine parts from S&S Cycle, Drag Specialties, V-Twin Mfg, Alloy Art, HardDrive and Rocker Lockers. Pair your build with an air cleaner and exhaust that let it breathe.
Not Sure It Fits?
Year, model and engine all matter, and plenty of parts look the same but aren't. If you can't tell whether something fits your bike, hit us up with your year and model and we'll check it before you order.