Big Bore Kits
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S&S Cycle - 09040149 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black w/o Highlighted Fins - M8
S&S Cycle
$1,849.95S&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...$1,849.95 -
S&S Cycle - 09040152 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black w/o Highlighted Fins - M8
S&S Cycle
$1,849.95S&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...$1,849.95 -
S&S Cycle - 09040151 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black w/Highlighted Fins - M8
S&S Cycle
$1,849.95S&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...$1,849.95 -
S&S Cycle - 09040150 - 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black Granite w/Highlighted Fins - M8
S&S Cycle
$1,849.95S&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...$1,849.95 -
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 - 310-1052B - 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 requiredForged pistons11:1 Compression ratioOil Pump/Cam...MSRP: $3,265.95$3,109.95 -
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 machining requiredForged pistons11.1 Compression ratioOil...MSRP: $3,265.95$3,109.95 -
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" stroke M-Eight to 128" with no case machining...MSRP: $3,265.95$3,169.95 -
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" stroke M-Eight to 128" with no case machining...$3,460.95 -
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" stroke M-Eight to 128" with no case machining...MSRP: $3,265.95$3,169.95 -
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 requiredForged pistons11:1 Compression ratioOil Pump/Cam...MSRP: $3,265.95$3,109.95 -
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 - 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 4-1/2" stroke M-Eight to 128" with no case machining...MSRP: $3,265.95$3,109.95 -
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 requiredForged pistons11:1 Compression ratioOil Pump/Cam...MSRP: $3,695.95$3,289.95 -
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" stroke M-Eight to 128" with no case machining...MSRP: $3,460.95$3,359.95 -
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 matching required Forged pistons 11:1 Compression...MSRP: $3,460.95$3,359.95 -
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 requiredForged pistons11:1 Compression ratioOil Pump/Cam...MSRP: $3,460.95$3,359.95 -
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 - 310-1227 - 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 bore cylinders come with matching cam, cam plate and oil...MSRP: $3,559.95$3,359.95 -
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 bore cylinders come with matching cam, cam plate and...MSRP: $3,559.95$3,359.95 -
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 relief valve can be adjusted with unit installed in the...MSRP: $3,559.95$3,359.95 -
S&S Cycle - 310-1236 - 132" Power Package Engine Performance Kit - Gear Drive - Water Cooled - Highlighted Fins - M8
S&S Cycle
MSRP: $3,559.95$3,359.95S&S Cycle - 310-1236 - 132" Power Package Engine Performance Kit - Gear Drive - Water Cooled - Highlighted Fins - M8FeaturesTransform the 114" or the 117" water-cooled M8 into 132"Adjustable pressure relief valve can be adjusted with unit installed in...MSRP: $3,559.95$3,359.95
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.