Big Bore Kits
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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
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...$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...$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...$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...$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...$1,595.95 -
Out of stock
S&S Cycle - 310-1223D - Power Pack - Oil Cooled - 550C - Wrinkle Black w/Highlight - Chrome Pushrod Tubes - 107" M8
S&S Cycle
$3,294.95S&S Cycle - 310-1223D - Power Pack - Oil Cooled - 550C - Wrinkle Black w/Highlight - Chrome Pushrod Tubes - 107" M8Features4.32" bore cylinders with 11.0:1 compression ratio forged pistonsS&S oil...$3,294.95 -
Out of stock
S&S Cycle - 310-1052D - Power Pack - Oil Cooled - 550C - Wrinkle Black w/Highlight - Chrome Pushrod Tubes - M8
S&S Cycle
$3,294.95S&S Cycle - 310-1052D - Power Pack - Oil Cooled - 550C - Wrinkle Black w/Highlight - Chrome Pushrod Tubes - M8FeaturesUpdated finsNo case machining requiredForged pistonsMade in the USAIncludes oil...$3,294.95 -
Out of stock
Cometic - C10218 - Top End Kit M8 4.00" 114Cu Cvo .040"H/G
Cometic
$238.10Cometic - C10218 - Top End Kit M8 4.00" 114Cu Cvo .040"H/GFeaturesAt Cometic Gasket, our goal is to offer the latest in gasket technologyMaterials, manufacturing processes and gasket designs are...$238.10 -
Out of stock
Cometic - C10218-030 - Top End Kit M8 4.00" 114Cu Cvo .030"H/G
Cometic
$238.10Cometic - C10218-030 - Top End Kit M8 4.00" 114Cu Cvo .030"H/GFeaturesAt Cometic Gasket, our goal is to offer the latest in gasket technologyMaterials, manufacturing processes and gasket designs are...$238.10 -
Out of stock
Cometic - C10219-030 - Top End Kit M8 4.075" 114Cu .030"H/G
Cometic
$238.10Cometic - C10219-030 - Top End Kit M8 4.075" 114Cu .030"H/GFeaturesAt Cometic Gasket, our goal is to offer the latest in gasket technologyMaterials, manufacturing processes and gasket designs are...$238.10 -
Out of stock
Cometic - C10220 - Top End Kit M8 4.125" 117Cu .040"H/G
Cometic
$238.10Cometic - C10220 - Top End Kit M8 4.125" 117Cu .040"H/GFeaturesAt Cometic Gasket, our goal is to offer the latest in gasket technologyMaterials, manufacturing processes and gasket designs are...$238.10 -
Out of stock
Cometic - C10221 - Top End Kit M8 4.185" 120Cu .040"H/G
Cometic
$238.10Cometic - C10221 - Top End Kit M8 4.185" 120Cu .040"H/GFeaturesAt Cometic Gasket, our goal is to offer the latest in gasket technologyMaterials, manufacturing processes and gasket designs are...$238.10 -
Out of stock
Cometic - C10221-030 - Top End Kit M8 4.185" 120Cu .030"H/G
Cometic
$238.10Cometic - C10221-030 - Top End Kit M8 4.185" 120Cu .030"H/GFeaturesAt Cometic Gasket, our goal is to offer the latest in gasket technologyMaterials, manufacturing processes and gasket designs are...$238.10 -
Out of stock
Cometic - C10222 - Top End Kit M8 4.200" 121Cu .040"H/G
Cometic
$238.10Cometic - C10222 - Top End Kit M8 4.200" 121Cu .040"H/GFeaturesAt Cometic Gasket, our goal is to offer the latest in gasket technologyMaterials, manufacturing processes and gasket designs are...$238.10 -
Out of stock
Cometic - C10222-030 - Top End Kit M8 4.200" 121Cu .030"H/G
Cometic
$238.10Cometic - C10222-030 - Top End Kit M8 4.200" 121Cu .030"H/GFeaturesAt Cometic Gasket, our goal is to offer the latest in gasket technologyMaterials, manufacturing processes and gasket designs are...$238.10 -
Out of stock
Cometic - C10223 - Top End Kit M8 4.250" 124Cu .040"H/G C Only
Cometic
$238.10Cometic - C10223 - Top End Kit M8 4.250" 124Cu .040"H/G C OnlyFeaturesAt Cometic Gasket, our goal is to offer the latest in gasket technologyMaterials, manufacturing processes and gasket designs are...$238.10 -
Out of stock
Cometic - C10223-030 - Top End Kit M8 4.250" 124Cu .030"H/G C Only
Cometic
$238.10Cometic - C10223-030 - Top End Kit M8 4.250" 124Cu .030"H/G C OnlyFeaturesAt Cometic Gasket, our goal is to offer the latest in gasket technologyMaterials, manufacturing processes and gasket designs...$238.10 -
Out of stock
Cometic - C10224 - M8 4.320" 128Cu T/E Kit040" H/G Oe#25700729
Cometic
$238.10Cometic - C10224 - M8 4.320" 128Cu T/E Kit040" H/G Oe#25700729FeaturesFitment2018-2021Harley DavidsonFLHR Road King2018-2021Harley Davids$238.10 -
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
V-Twin - 11-1259 - 107 inch Big Bore Twin Cam Cylinder Kit
Motorshop
$480.26V-Twin - 11-1259 - 107 inch Big Bore Twin Cam Cylinder KitDescriptionTC-88 Big Bore cylinder kit includes forged 10.5:1 piston kit and silver cylinders. This kit requires case machining and fits a...$480.26 -
Out of stock
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...$488.03 -
Out of stock
V-Twin - 11-0510 - Big Bore Gasket and Parts Kit
Motorshop
$100.93V-Twin - 11-0510 - Big Bore Gasket and Parts KitDescriptionMagnum cylinder small parts kit is for installing 3-5/8" barrels on Shovelhead cases. Kit includes 2 head gaskets, base gaskets, 8 cylinder...$100.93 -
Out of stock
V-Twin - 11-0075 - 95 inch Big Bore Twin Cam Cylinder and Piston Kit
Motorshop
$470.64V-Twin - 11-0075 - 95 inch Big Bore Twin Cam Cylinder and Piston KitDescription95" Big Bore bolt on cylinder kit will increase TC-88 engine to 95". Kit includes silver cylinders with 10.25:1 cast...$470.64 -
Out of stock
V-Twin - 11-0074 - 95 inch Big Bore Black Cylinder Kit
Motorshop
$543.91V-Twin - 11-0074 - 95 inch Big Bore Black Cylinder KitDescription95" Big Bore bolt on cylinder kit will increase TC-88 engines to 95".Kit includes two 95" black cylinders, two 10.25:1 compression...$543.91 -
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
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.