Big Bore Kits
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S&S Cycle - 09040148 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black w/Highlighted Fins - M8
S&S Cycle
$1,849.95S&S CYCLE - 09040148 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black w/Highlighted Fins - M8Features132" high compression kit will work on 114"/117" motors with 4-1/2" stroke flywheels onlyTo achieve 136" big bore, S&S flywheel with...$1,849.95 -
S&S Cycle - 09040147 - Power Pack - 4.375" Stroke - Water Cooled - Black w/Highlights - M8
S&S Cycle
$3,497.95S&S CYCLE - 09040147 - Power Pack - 4.375" Stroke - Water Cooled - Black w/Highlights - M8FeaturesBolt-on kitWith updated finsNo case machining requiredForged pistonsMade in the USAIncludes oil pump/cam plate, pushrods, tappets, tappet cuffs, 550...$3,497.95 -
S&S Cycle - 09040146 - Power Pack - 4.375" Stroke - Water Cooled - Black w/Highlights - M8
S&S Cycle
$3,294.95S&S CYCLE - 09040146 - Power Pack - 4.375" Stroke - Water Cooled - Black w/Highlights - M8FeaturesBolt-on kitWith updated finsNo case machining requiredForged pistonsMade in the USAIncludes oil pump/cam plate, pushrods, tappets, tappet cuffs, 550...$3,294.95 -
S&S Cycle - 09040140 - Power Pack - 4.375" Stroke - Oil Cooled - Black w/o Highlights - M8
S&S Cycle
$3,497.95S&S CYCLE - 09040140 - Power Pack - 4.375" Stroke - Oil Cooled - Black w/o Highlights - M8FeaturesBolt-on kitWith updated finsNo case machining requiredForged pistonsMade in the USAIncludes oil pump/cam plate, pushrods, tappets, tappet cuffs, 550...$3,497.95 -
S&S Cycle - 09040139 - Power Pack - 4.375" Stroke - Oil Cooled - Black w/Highlights - M8
S&S Cycle
$3,497.95S&S CYCLE - 09040139 - Power Pack - 4.375" Stroke - Oil Cooled - Black w/Highlights - M8FeaturesBolt-on kitWith updated finsNo case machining requiredForged pistonsMade in the USAIncludes oil pump/cam plate, pushrods, tappets, tappet cuffs, 550 camshaft,...$3,497.95 -
S&S Cycle - 09040138 - Power Pack - 4.375" Stroke - Oil Cooled - Black Granite w/Highlights - M8
S&S Cycle
MSRP: $3,695.95$3,497.95S&S CYCLE - 09040138 - Power Pack - 4.375" Stroke - Oil Cooled - Black Granite w/Highlights - M8FeaturesBolt-on kitWith updated finsNo case machining requiredForged pistonsMade in the USAIncludes oil pump/cam plate, pushrods, tappets, tappet cuffs, 550...MSRP: $3,695.95$3,497.95 -
S&S Cycle - 09040136 - Power Pack - 4.375" Stroke - Oil Cooled - Black w/Highlights - M8
S&S Cycle
$3,294.95S&S CYCLE - 09040136 - Power Pack - 4.375" Stroke - Oil Cooled - Black w/Highlights - M8FeaturesBolt-on kitWith updated finsNo case machining requiredForged pistonsMade in the USAIncludes oil pump/cam plate, pushrods, tappets, tappet cuffs, 550 camshaft,...$3,294.95 -
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 pump/cam plate, pushrods, tappets, tappet cuffs, 550...$3,294.95 -
V-Twin - 11-1513 - 88 inch Evolution Big Bore Cylinder Kit Silver
Motorshop
$646.45V-Twin - 11-1513 - 88 inch Evolution Big Bore Cylinder Kit SilverDescriptionIncrease your stock Evolution engine with our 88" cylinder kit.Our kit includes two 3-5/8" silver cylinders which have been honed for final fitment with Wiseco 9.25:1 compression...$646.45 -
V-Twin - 11-1421 - 1800cc 4 inch Big Bore Cylinder
Motorshop
$495.96V-Twin - 11-1421 - 1800cc 4 inch Big Bore CylinderDescriptionTwin Cam 96 or 103 Big Bore cylinder is black with aluminum high-lighted fin edges. Used to increase 96 or 103cc to 1800cc.The finished honed size of this bore cylinder is 4.005". Fits:FLT...$495.96 -
V-Twin - 11-1196 - M8 Big Bore Black Cylinder Set
Motorshop
$488.03V-Twin - 11-1196 - M8 Big Bore Black Cylinder SetDescriptionBlack 4.250" big bore cylinder set with machined edge fins increase the bore size from 124" to 128". Features a slightly larger fin area for better heat dissipation and increased cooling.For use...$488.03 -
V-Twin - 11-0533 - 88 inch Evolution Big Bore Cylinder Black
Motorshop
$345.44V-Twin - 11-0533 - 88 inch Evolution Big Bore Cylinder BlackDescriptionIncrease your stock 80" Evolution engine with our big bore cylinder to 88" cubic inches.This is 3-5/8" black cylinder will have to be honed for final fitment. Case boring will be...$345.44 -
V-Twin - 11-0532 - 88 inch Evolution Big Bore Cylinder Silver
Motorshop
$270.68V-Twin - 11-0532 - 88 inch Evolution Big Bore Cylinder SilverDescriptionIncrease your stock 80" Evolution engine with our big bore cylinder to 88" cubic inches.This 3-5/8" silver cylinder will have to be honed for final fitment. Case boring will be...$270.68 -
V-Twin - 11-0094 - 88 inch Evolution Big Bore Cylinder Kit Silver
Motorshop
$772.07V-Twin - 11-0094 - 88 inch Evolution Big Bore Cylinder Kit SilverDescriptionIncrease your stock Evolution engine with our 88" cylinder kit.Our kit includes two 3-5/8" silver cylinders which have been honed for final fitment with Wiseco 9.25:1 compression...$772.07 -
V-Twin - 10-1139 - Panhead Cylinder Heads 3-5/8 inch Big Bore
Motorshop
$1,458.31V-Twin - 10-1139 - Panhead Cylinder Heads 3-5/8 inch Big BoreDescriptionV-Twin Motor Shop Ready single plug type Panheads are assembled and are ready to install.Heads are assembled with cast iron guides, valve stem seals, nitrated valves, Shovelhead...$1,458.31 -
V-Twin - 10-1086 - Panhead Cylinder Heads 3-5/8 inch Big Bore
V-Twin Mfg
$2,301.43V-Twin - 10-1086 - Panhead Cylinder Heads 3-5/8 inch Big BoreDescriptionV-Twin Motor Shop Ready single plug type Panheads are for use with Big Bore shovel head cylinders only. Comes assembled and are ready to install.Heads are assembled with cast iron...$2,301.43 -
V-Twin - 8714-20 - Big Bore 12 Pt Head Bolt Kit Chrome
Colony Machine
MSRP: $69.68$62.71V-Twin - 8714-20 - Big Bore 12 Pt Head Bolt Kit Chrome Description Big Bore 12 pt headbolt kit in Chrome. Fits: FX 1971-1984 FL 1948-1984 Additional Information OEM No. 16814-48 UOM 1 -...MSRP: $69.68$62.71 -
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 requiredForged pistons11.1 Compression ratioOil...MSRP: $3,265.95$3,169.95 -
S&S Cycle - 920-0100 - Big Bore Forged Piston Kit - 3.937" Bore - 107" Twin Cam - Standard
S&S Cycle
$514.95S&S Cycle - 920-0100 - Big Bore Forged Piston Kit - 3.937" Bore - 107" Twin Cam - StandardFeaturesPistons are compatible with stock rods with tapered wristpin endsStock cylinders may be bored to accommodate larger pistonBore cylinders to nominal diameter...$514.95 -
S&S Cycle - 920-0101 - Big Bore Forged Piston Kit - 3.937" Bore - 98" Twin Cam - Standard
S&S Cycle
MSRP: $524.95$514.95S&S Cycle - 920-0101 - Big Bore Forged Piston Kit - 3.937" Bore - 98" Twin Cam - StandardFeaturesPistons are compatible with stock rods with tapered wristpin endsStock cylinders may be bored to accommodate larger pistonBore cylinders to nominal diameter...MSRP: $524.95$514.95 -
S&S Cycle - 920-0071 - Piston Kit - 1250cc Big Bore - XL
S&S Cycle
MSRP: $499.95$484.95S&S Cycle - 920-0071 - Piston Kit - 1250cc Big Bore - XLFeaturesPiston kit includes forged pistons, rings, wrist pin and clips for a complete motorDeck height is 1.207"Made in the USAThis kit is not compatible with XR1200 or RH Sportster.883 models...MSRP: $499.95$484.95 -
S&S Cycle - 920-0070 - Piston Kit - 1250cc Big Bore - XL
S&S Cycle
MSRP: $549.95$484.95S&S Cycle - 920-0070 - Piston Kit - 1250cc Big Bore - XLFeaturesPiston kit includes forged pistons, rings, wrist pin and clips for a complete motorDeck height is 1.207"Made in the USAThis kit is not compatible with XR1200 or RH Sportster.883 models...MSRP: $549.95$484.95 -
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 requiredBig bore cylinders come with matching cam, cam plate and...$3,359.95 -
S&S Cycle - 310-1231 - 132" Power Package Engine Performance Kit - Chain Drive - Oil Cooled - Highlighted Fins - M8
S&S Cycle
$3,359.95S&S Cycle - 310-1231 - 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 relief valve can be adjusted with unit installed in the...$3,359.95 -
S&S Cycle - 900-0354 - 106" Hot Set Up® Kit - 3.967" Bore - Wrinkle Black - Twin Cam
S&S Cycle
$2,143.95S&S Cycle - 900-0354 - 106" Hot Set Up® Kit - 3.967" Bore - Wrinkle Black - Twin CamFeaturesIncreased fin area for better heat dissipationIncrease bore size from 3.750" to 3.927"4.375" stroke, 10.0:1 compression with stock headsEasy installation; no...$2,143.95 -
Burly Brand - Black Brawler Kit fits M8 Softail Models
Burly Brand
$252.95 - $351.95Burly Brand - Black Brawler Kit fits M8 Softail Models Features: Designed to grind down during impacts to prevent bike from catching and flipping Functions as a highway bar for a secure grip and comfortable footrest on long rides Durable materials...$252.95 - $351.95 -
S&S Cycle - Silver Powdercoat 95" Big Bore Kit fits '99-'06 Twin Cam Engines (3.875" Bore, 4" Stroke, 9.7:1 Comp. W/ Stock Heads)
S&S Cycle
$1,287.95S&S Cycle - Silver Powdercoat 95" Big Bore Kit fits '99-'06 Twin Cam Engines (3.875" Bore, 4" Stroke, 9.7:1 Comp. W/ Stock Heads) This Big Bore Kit produces outstanding outcomes with stock cylinder heads. It comes complete with cylinders, pistons,...$1,287.95 -
S&S Cycle - Stone Gray Powdercoat 117" Big Bore Kit fits '07-'17 Twin Cam Engines (4.125" Bore, 4⅜" Stroke, 10.5:1 Comp. W/ Stock Heads)
S&S Cycle
$1,643.95S&S Cycle - Stone Gray Powdercoat 117" Big Bore Kit fits '07-'17 Twin Cam Engines (4.125" Bore, 4⅜" Stroke, 10.5:1 Comp. W/ Stock Heads) This Big Bore Kit produces outstanding outcomes with stock cylinder heads. It comes complete with cylinders,...$1,643.95 -
S&S Cycle - 3⅝" Big Bore Cylinder & Big Bore Piston Kit fits '66-'84 Shovelhead Engines
S&S Cycle
MSRP: $1,999.95$1,995.95S&S Cycle - 3⅝" Big Bore Cylinder & Big Bore Piston Kit fits '66-'84 Shovelhead Engines This kit can be used to construct an 88" engine, or to replace the cylinders and piston in an engine with an existing S&S® stock bore stroker kit...MSRP: $1,999.95$1,995.95 -
S&S Cycle - Wrinkle Black 100" Bolt-In Sidewinder® 4" Big Bore Kit fits '99-'06 Twin Cam Engines
S&S Cycle
MSRP: $1,550.95$1,540.95S&S Cycle - Wrinkle Black 100" Bolt-In Sidewinder® 4" Big Bore Kit fits '99-'06 Twin Cam Engines This Big Bore Kit has a 10.5:1 compression ratio (W/ stock 85cc heads) that will transform your engine into a street-ready and reliable machine...MSRP: $1,550.95$1,540.95 -
S&S Cycle - Silver 110" Bolt-In Sidewinder® 4" Big Bore Kit fits '07-'17 Twin Cam Engines
S&S Cycle
$1,540.95S&S Cycle - Silver 110" Bolt-In Sidewinder® 4" Big Bore Kit fits '07-'17 Twin Cam Engines This Big Bore Kit has a 10.5:1 compression ratio (W/ stock 85cc heads) that will transform your engine into a street-ready and reliable machine which will...$1,540.95 -
S&S Cycle - Black 4.375" Stroke 129" Big Bore Cylinder & Piston Kit fits '17 & Up M8 Engines
S&S Cycle
MSRP: $1,599.95$1,499.95S&S Cycle - Black 4.375" Stroke 129" Big Bore Cylinder & Piston Kit fits '17 & Up M8 Engines S&S Cycle's Big Bore Cylinder & Piston Kit delivers a mighty bore increase (4.320") that, in turn, delivers a huge power increase! It is...MSRP: $1,599.95$1,499.95 -
S&S Cycle - Silver XL883 to 1200 Conversion Kit fits '86-'20 XL 883 Models
S&S Cycle
$1,128.95S&S Cycle - Silver XL883 to 1200 Conversion Kit fits '86-'20 XL 883 Models This conversion kit installs in no time at all since the pistons are already fit to the cylinders, making them prepared for assembly as soon as you open them! The kits are...$1,128.95 -
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 displacement to 100" ('99-'06) and the cylinders fit...$3,396.95 -
Out of stock
V-Twin - 107" Big Bore Twin Cam Cylinder Kit fits '99-'06 FLST/FXST/FLT/FXD Model
V-Twin Mfg
$786.03V-Twin - 107" Big Bore Twin Cam Cylinder Kit fits '99-'06 FLST/FXST/FLT/FXD Model 107" Twin Cam big bore cylinder kit includes 10.5:1 piston kit and steel cylinders with black finish. Requires case machining and fits a 4" stroke flywheel...$786.03 -
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 finish and your choice of cylinders with or without...$3,359.95 - $3,460.95 -
Out of stock
S&S Cycle - Wrinkle Black 124" Big Bore Kit W/O Highlighted Cylinder Fins fits '17-'21 107" M8 Engines
S&S Cycle
$1,561.95S&S Cycle - Wrinkle Black 124" Big Bore Kit W/O Highlighted Cylinder Fins fits '17-'21 107" M8 Engines This is a bolt-on kit that features the biggest bore possible with no machining of the crankcases necessary! It includes all of the required...$1,561.95 -
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 without fin highlighting. You can also choose between a...$2,699.95 - $3,359.95 -
Out of stock
S&S Cycle - Wrinke Black 128" Big Bore Kit W/ Highlighted Cylinder Fins fits '17-'20 114" 117" M8 Engines
S&S Cycle
$1,595.95S&S Cycle - Wrinke Black 128" Big Bore Kit W/ Highlighted Cylinder Fins fits '17-'20 114" 117" M8 Engines This is a bolt-on kit that features the biggest cylinder bore possible with no machining of the crankcases necessary! It includes all of the...$1,595.95 -
Out of stock
Cometic - C10217 - Top End Kit M8 3.937" 107Cu .040"H/G Oe#25700729
Cometic
$238.10Cometic - C10217 - Top End Kit M8 3.937" 107Cu .040"H/G Oe#25700729FeaturesAt Cometic Gasket, our goal is to offer the latest in gasket technologyMaterials, manufacturing processes and gasket designs are constantly improving to match the higher level of...$238.10
Harley Big Bore Kits
Deadbeat Customs knows Big Bore Kits are the key to increasing displacement on your Harley. Big Bore Kits replace your stock pistons and cylinders with larger ones, leading to greater displacement. When it comes to performance there’s no replacement for displacement! We have an excellent selection of kits manufactured by S&S Cycle, which come complete with all instructions to ease the installation process. The Big Bore Kits come complete with all necessary hardware. The only decisions you’ll need to make will be choosing the right fitment and finish.