Big Bore Kits
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S&S Cycle - 128" Power Packages fits '17-'21 M8 Oil-Cooled Engines
S&S Cycle
$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...$3,460.95 -
S&S Cycle - Wrinkle Black XL883 to 1200 Conversion Kit fits '86-'20 XL 883 Models
S&S Cycle
$1,095.95S&S Cycle - Wrinkle Black 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...$1,095.95 -
S&S Cycle - 124" Power Packages fits '17-'21 M8 Oil-Cooled Engines
S&S Cycle
$2,699.95 - $3,695.95S&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 - $3,695.95 -
S&S Cycle - Hooligan Kits fits '00-'20 XL Models
S&S Cycle
$1,709.95 - $1,999.95S&S Cycle - Hooligan Kits fits '00-'20 XL Models S&S Cycle's Hooligan Kits are bolt on big-bore kits that provide easy installation without any machining or rebalancing. The cams are .482" lift and 240° duration intake and 234° degree...$1,709.95 - $1,999.95 -
Out of stock
S&S Big Bore Kit for M8 Harley Softail & Touring '17-Up
S&S Cycle
$929.95S&S Big Bore Kit for M8 Harley Softail & Touring '17-Up This S&S Big Bore Kit is for Milwaukee-Eight Harley Softail and Touring models 2017 and up, including Softail Heritage Classic and Breakout. Available as a whole kit or as a cylinder...$929.95 -
S&S Cycle - 96" Big Bore Kit fits '84-'00 Evolution Big Twin Engines (3⅝" Bore, 4⅝" Stroke, 9.75:1 Compression Ratio W/ Stock Heads)
S&S Cycle
$1,445.95S&S Cycle - 96" Big Bore Kit fits '84-'00 Evolution Big Twin Engines (3⅝" Bore, 4⅝" Stroke, 9.75:1 Compression Ratio W/ Stock Heads) The cylinders featured in this kit are built with premium aluminum castings with cast-in iron liners. This kit also...$1,445.95 -
S&S Cycle - Wrinkle Black 110" Bolt-In Sidewinder® 4" Big Bore Kit fits '07-'17 Twin Cam Engines
S&S Cycle
$1,549.95S&S Cycle - Wrinkle Black 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...$1,549.95 -
S&S Cycle - 110" Power Package fits '07-'17 Twin Cam Engines
S&S Cycle
$3,345.95 - $3,467.95S&S Cycle - 110" Power Package fits '07-'17 Twin Cam Engines S&S Cycle has created the largest big-bore kits available today, without doing crankcase mods! This kit increases displacement to 110" ('07-'17) and the cylinders fit to the pistons...$3,345.95 - $3,467.95 -
S&S Cycle - 09040169 - 132" Power Pack - 550 Chain Drive - Water Cooled - Wrinkle Black w/Highlight Fins - M8
S&S Cycle
$3,359.95S&S CYCLE - 09040169 - 132" Power Pack - 550 Chain Drive - Water Cooled - Wrinkle Black w/Highlight Fins - M8Features550 lift for the ideal combination of horse power and torquePowder coat finish matched to factoryMLS (Multi-Layered Steel) head...$3,359.95 -
S&S Cycle - 09040167 - 129" Power Pack - 550 Chain Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - M8
S&S Cycle
$3,359.95S&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 matched to factoryMLS (Multi-Layered Steel) head...$3,359.95 -
S&S Cycle - 09040166 - 129" Power Pack - 550 Chain Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - M8
S&S Cycle
$3,359.95S&S CYCLE - 09040166 - 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 matched to factoryMLS (Multi-Layered Steel) head...$3,359.95 -
S&S Cycle - 09040165 - 129" Power Pack - 550 Chain Drive - Oil Cooled - Wrinkle Black w/o Highlight Fins - M8
S&S Cycle
$3,359.95S&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 matched to factoryMLS (Multi-Layered Steel) head...$3,359.95 -
S&S Cycle - 09040164 - 132" Power Pack - 550 Chain Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - M8
S&S Cycle
$3,359.95S&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 matched to factoryMLS (Multi-Layered Steel) head...$3,359.95 -
S&S Cycle - 09040162 - 132" Power Pack - 550 Chain Drive - Oil Cooled - Black Granite w/Highlight Fins - M8
S&S Cycle
$3,359.95S&S CYCLE - 09040162 - 132" Power Pack - 550 Chain Drive - Oil Cooled - Black Granite w/Highlight Fins - M8Features550 lift for the ideal combination of horse power and torquePowder coat finish matched to factoryMLS (Multi-Layered Steel) head...$3,359.95 -
S&S Cycle - 09040160 - 132" Power Pack - 550 Gear Drive - Water Cooled - Black Granite w/Highlight Fins - M8
S&S Cycle
$3,559.95S&S CYCLE - 09040160 - 132" Power Pack - 550 Gear Drive - Water Cooled - Black Granite w/Highlight Fins - M8Features550 lift for the ideal combination of horse power and torquePowder coat finish matched to factoryMLS (Multi-Layered Steel) head...$3,559.95 -
S&S Cycle - 09040161 - 132" Power Pack - 550 Gear Drive - Water Cooled - Wrinkle Black w/Highlight Fins - M8
S&S Cycle
$3,559.95S&S CYCLE - 09040161 - 132" Power Pack - 550 Gear Drive - Water Cooled - Wrinkle Black w/Highlight Fins - M8Features550 lift for the ideal combination of horse power and torquePowder coat finish matched to factoryMLS (Multi-Layered Steel) head...$3,559.95 -
S&S Cycle - 09040158 - 129" Power Pack - 550 Gear Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - M8
S&S Cycle
$3,559.95S&S CYCLE - 09040158 - 129" Power Pack - 550 Gear Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - M8Features550 lift for the ideal combination of horse power and torquePowder coat finish matched to factoryMLS (Multi-Layered Steel) head...$3,559.95 -
S&S Cycle - 09040157 - 129" Power Pack - 550 Gear Drive - Oil Cooled - Wrinkle Black w/o Highlight Fins - M8
S&S Cycle
$3,559.95S&S CYCLE - 09040157 - 129" Power Pack - 550 Gear Drive - Oil Cooled - Wrinkle Black w/o Highlight Fins - M8Features550 lift for the ideal combination of horse power and torquePowder coat finish matched to factoryMLS (Multi-Layered Steel) head...$3,559.95 -
S&S Cycle - 09040156 - 132" Power Pack - 550 Gear Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - M8
S&S Cycle
$3,559.95S&S CYCLE - 09040156 - 132" Power Pack - 550 Gear Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - M8Features550 lift for the ideal combination of horse power and torquePowder coat finish matched to factoryMLS (Multi-Layered Steel) head...$3,559.95 -
S&S Cycle - 09040154 - 132" Power Pack - 550 Gear Drive - Oil Cooled - Black Granite w/Highlight Fins - M8
S&S Cycle
$3,559.95S&S CYCLE - 09040154 - 132" Power Pack - 550 Gear Drive - Oil Cooled - Black Granite w/Highlight Fins - M8Features550 lift for the ideal combination of horse power and torquePowder coat finish matched to factoryMLS (Multi-Layered Steel) head...$3,559.95 -
S&S Cycle - 09040155 - 132" Power Pack - 550 Gear Drive - Oil Cooled - Black w/o Highlight Fins - M8
S&S Cycle
$3,559.95S&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 factoryMLS (Multi-Layered Steel) head gasketsIncludes...$3,559.95 -
S&S Cycle - 09040153 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black Granite w/Highlighted Fins - M8
S&S Cycle
$1,695.95S&S CYCLE - 09040153 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black Granite 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...$1,695.95 -
S&S Cycle - 09040149 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black w/o Highlighted Fins - M8
S&S Cycle
$1,695.95S&S CYCLE - 09040149 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black w/o 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...$1,695.95 -
S&S Cycle - 09040152 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black w/o Highlighted Fins - M8
S&S Cycle
$1,695.95S&S CYCLE - 09040152 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black w/o 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...$1,695.95 -
S&S Cycle - 09040151 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black w/Highlighted Fins - M8
S&S Cycle
$1,695.95S&S CYCLE - 09040151 - 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...$1,695.95 -
S&S Cycle - 09040150 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black Granite w/Highlighted Fins - M8
S&S Cycle
$1,695.95S&S CYCLE - 09040150 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black Granite 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...$1,695.95 -
S&S Cycle - 09040148 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black w/Highlighted Fins - M8
S&S Cycle
$1,695.95S&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...$1,695.95 -
S&S Cycle - 09040147 - Power Pack - 4.375" Stroke - Water Cooled - Black w/Highlights - M8
S&S Cycle
$3,460.95S&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...$3,460.95 -
S&S Cycle - 09040146 - Power Pack - 4.375" Stroke - Water Cooled - Black w/Highlights - M8
S&S Cycle
$3,265.95S&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...$3,265.95 -
S&S Cycle - 09040145 - Power Pack - 4.375" Stroke - Water Cooled - Black w/Highlights - M8
S&S Cycle
$3,265.95S&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 pump/cam plate, pushrods, tappets, tappet cuffs, 550...$3,265.95 -
S&S Cycle - 09040140 - Power Pack - 4.375" Stroke - Oil Cooled - Black w/o Highlights - M8
S&S Cycle
$3,460.95S&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...$3,460.95 -
S&S Cycle - 09040139 - Power Pack - 4.375" Stroke - Oil Cooled - Black w/Highlights - M8
S&S Cycle
$3,460.95S&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,...$3,460.95 -
S&S Cycle - 09040138 - Power Pack - 4.375" Stroke - Oil Cooled - Black Granite w/Highlights - M8
S&S Cycle
$3,695.95S&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...$3,695.95 -
S&S Cycle - 09040136 - Power Pack - 4.375" Stroke - Oil Cooled - Black w/Highlights - M8
S&S Cycle
$3,265.95S&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,...$3,265.95 -
S&S Cycle - 09040135 - Power Pack - 4.375" Stroke - Oil Cooled - Black Granite w/Highlights - M8
S&S Cycle
$3,265.95S&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...$3,265.95 -
V-Twin - 11-1421 - 1800cc 4 inch Big Bore Cylinder
Motorshop
$483.64V-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...$483.64 -
V-Twin - 11-1253 - 83 inch Evolution Big Bore Cylinder Kit
Motorshop
$828.37V-Twin - 11-1253 - 83 inch Evolution Big Bore Cylinder KitDescriptionEvolution 83" Big Bore bolt on black cylinder kit includes 10:1 compression Wiseco forged piston kit, which has been honed for final fitment.Cylinders are aluminum and features a cast...$828.37 -
V-Twin - 11-1196 - M8 Big Bore Black Cylinder Set
Motorshop
$513.71V-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...$513.71 -
V-Twin - 11-0533 - 88 inch Evolution Big Bore Cylinder Black
Motorshop
$359.10V-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...$359.10 -
V-Twin - 11-0532 - 88 inch Evolution Big Bore Cylinder Silver
Motorshop
$286.44V-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...$286.44
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.