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Engine - Cylinder Kits - Cylinders & Kits

522 products
Powersport Superstore is your go-to source for Engine - Cylinder Kits - Cylinders & Kits and related parts. Shop our unbeatable selection of Cylinders & Kits with top-tier service, fast shipping, and great prices.
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Vehicle Fitment Combos Show all Vehicle Fitment Combos
10% Off
Regular price $3,114.86
Sale price $3,114.86
Regular price $3,460.95
Unit price
per 
For M8 models with 4.500in. stroke. Big-bore bolt-on kit increases your 114in./ 117in. with 4.5in. stroke M-Eight to 128in. with no case machining required. 4 1/4in. bore cylinders with 11:1 forged...
10% Off
Regular price $2,939.36
Sale price $2,939.36
Regular price $3,265.95
Unit price
per 
For M8 models with 4.500in. stroke. Big-bore bolt-on kit increases your 114in./ 117in. with 4.5in. stroke M-Eight to 128in. with no case machining required. 4 1/4in. bore cylinders with 11:1 forged...
10% Off
Regular price $3,114.86
Sale price $3,114.86
Regular price $3,460.95
Unit price
per 
For M8 models with 4.500in. stroke. Big-bore bolt-on kit increases your 114in./ 117in. with 4.5in. stroke M-Eight to 128in. with no case machining required. 4 1/4in. bore cylinders with 11:1 forged...
9% Off
Regular price $3,036.30
Sale price $3,036.30
Regular price $3,345.95
Unit price
per 
Largest big bore kits available without doing crankcase mods. Includes an S&S 4in. big bore cylinder kit with 10.5:1 pistons, S&S 585 easy start cams, S&S Quickee Pushrods, and S&S ...
9% Off
Regular price $3,036.30
Sale price $3,036.30
Regular price $3,345.95
Unit price
per 
Largest big bore kits available without doing crankcase mods. Includes an S&S 4in. big bore cylinder kit with 10.5:1 pistons, S&S 585 easy start cams, S&S Quickee Pushrods, and S&S ...
6% Off
Regular price $3,277.19
Sale price $3,277.19
Regular price $3,467.95
Unit price
per 
Largest big bore kits available without doing crankcase mods. Includes an S&S 4in. big bore cylinder kit with 10.5:1 pistons, S&S 585 easy start cams, S&S Quickee Pushrods, and S&S ...
9% Off
Regular price $3,146.10
Sale price $3,146.10
Regular price $3,467.95
Unit price
per 
Largest big bore kits available without doing crankcase mods. Includes an S&S 4in. big bore cylinder kit with 10.5:1 pistons, S&S 585 easy start cams, S&S Quickee Pushrods, and S&S ...
10% Off
Regular price $1,705.26
Sale price $1,705.26
Regular price $1,886.95
Unit price
per 
Dual Plugs/internal Oil Drains. Heads come completely assembled with valve seats, valves, guides, seals, .590in. lift valve springs, collars and valve keepers. Complete kits also include rocker co...
10% Off
Regular price $1,483.16
Sale price $1,483.16
Regular price $1,649.95
Unit price
per 
132in. BIG BORE KIT FOR M-EIGHT 114in./ 117in. ENGINES. Bolt-on kit, the largest cylinder bore possible without requiring machining of the crankcases. 4.320in. bore and 4.5in. stroke. 11:1 forged p...
10% Off
Regular price $1,405.76
Sale price $1,405.76
Regular price $1,561.95
Unit price
per 
Available for both 107 and 114 M8 models. Available in both highlighted and non highlighted versions. Wrinkle black finish. Non-highlighted fins. Bolt-on kit. Largest bore possible without machinin...
10% Off
Regular price $1,409.36
Sale price $1,409.36
Regular price $1,565.95
Unit price
per 
Bolt in - no machining, balancing, or splitting the crankcases; install can be performed with engine still in frame. Cast Ductile Iron Sleeve in cast aluminum for superior heat transfer. 88in. engi...
10% Off
Regular price $1,443.30
Sale price $1,443.30
Regular price $1,595.95
Unit price
per 
The Big Bore kit yields excellent results with stock cylinder heads (not for Twin Cooled motors). Easy installation: no need to bore or split existing cases, just swap the cylinders (unless noted)....
10% Off
Regular price $1,518.90
Sale price $1,518.90
Regular price $1,679.95
Unit price
per 
The Big Bore kit yields excellent results with stock cylinder heads (not for Twin Cooled motors). Easy installation: no need to bore or split existing cases, just swap the cylinders (unless noted)....
10% Off
Regular price $1,442.46
Sale price $1,442.46
Regular price $1,594.95
Unit price
per 
Bolt in - no machining, balancing, or splitting the crankcases; install can be performed with engine still in frame. Cast Ductile Iron Sleeve in cast aluminum for superior heat transfer. 88in. engi...
10% Off
Regular price $1,429.86
Sale price $1,429.86
Regular price $1,580.95
Unit price
per 
Upgrades 74in. and 80in. Shovelhead engines to 84in. displacement at approximately 8.4:1 or 7.3:1 compression (depending on pistons used). Includes a dynamically balanced 4 1/2in. stroke flywheel a...
10% Off
Regular price $1,443.30
Sale price $1,443.30
Regular price $1,595.95
Unit price
per 
The Big Bore kit yields excellent results with stock cylinder heads (not for Twin Cooled motors). Easy installation: no need to bore or split existing cases, just swap the cylinders (unless noted)....
10% Off
Regular price $1,443.30
Sale price $1,443.30
Regular price $1,595.95
Unit price
per 
Kit includes fitted forged pistons, pins, clips, rings, cylinders, head gaskets, base, and exhaust gaskets. For stock heads or S&S heads with stock bolt pattern. 4.625in. stroke.Vehicle Fitment...
Regular price $7,307.14
Sale price $7,307.14
Regular price
Unit price
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Complete kit that dramatically boosts the power output. Approximately 50% increase in horsepower over factory. Kit is tuned for 10 psi of boost. All stainless steel air tubes with silicone couplers...

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