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Big Bore Kits

149 parts

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  • S&S Cycle - Silver Powdercoat 106" Big Bore Kit fits '06-'17 Twin Cam Engines (3.937" Bore, 4⅜" Stroke, 10:1 Comp. W/ Stock Heads)

    S&S Cycle - 910-0202 - Silver Powdercoat 106" Big Bore Kit - Fits '06-'17 Twin Cam Engines (3.937" Bore, 4⅜" Stroke, 10:1 Comp. W/ Stock Heads)

    S&S Cycle

    $1,219.95
    S&S Cycle - 910-0202 - Silver Powdercoat 106" Big Bore Kit - Fits '06-'17 Twin Cam Engines (3.937" Bore, 4⅜" Stroke, 10:1 Comp. W/ Stock Heads) Fits: '06-'17 Twin Cam Engines (3.937" Bore, 4⅜"...
    $1,219.95
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    $1,219.95
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  • S&S Cycle - Black Powdercoat 97" Big Bore Kit fits '99-'06 Twin Cam Engines (3.927" Bore, 4" Stroke, 9.7:1 Comp. W/ Stock Heads) S&S Cycle - Black Powdercoat 97" Big Bore Kit fits '99-'06 Twin Cam Engines (3.927" Bore, 4" Stroke, 9.7:1 Comp. W/ Stock Heads)

    S&S Cycle - 910-0205 - Black Powdercoat 97" Big Bore Kit - Fits '99-'06 Twin Cam Engines (3.927" Bore, 4" Stroke, 9.7:1 Comp. W/ Stock Heads)

    S&S Cycle

    $1,287.95
    S&S Cycle - 910-0205 - Black Powdercoat 97" Big Bore Kit - Fits '99-'06 Twin Cam Engines (3.927" Bore, 4" Stroke, 9.7:1 Comp. W/ Stock Heads) Fits: '99-'06 Twin Cam Engines (3.927" Bore, 4" Stroke, 9...
    $1,287.95
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    $1,287.95
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  • S&S Cycle - Silver Powdercoat 97" Big Bore Kit fits '99-'06 Twin Cam Engines (3.927" Bore, 4" Stroke, 9.7:1 Comp. W/ Stock Heads)

    S&S Cycle - 910-0201 - Silver Powdercoat 97" Big Bore Kit - Fits '99-'06 Twin Cam Engines (3.927" Bore, 4" Stroke, 9.7:1 Comp. W/ Stock Heads)

    S&S Cycle

    $1,219.95
    S&S Cycle - 910-0201 - Silver Powdercoat 97" Big Bore Kit - Fits '99-'06 Twin Cam Engines (3.927" Bore, 4" Stroke, 9.7:1 Comp. W/ Stock Heads) Fits: '99-'06 Twin Cam Engines (3.927" Bore, 4" Stroke,...
    $1,219.95
    Qty in Cart: 0
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    $1,219.95
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  • S&S Cycle - Black Powdercoat 107" Big Bore Kit fits All '07-'17 Twin Cam Models (3.937" Bore, 4⅜" Stroke, 10.5:1 Comp. W/ Stock Heads)

    S&S Cycle - 910-0500 - Black Powdercoat 107" Big Bore Kit - Fits All '07-'17 Twin Cam Models (3.937" Bore, 4⅜" Stroke, 10.5:1 Comp. W/ Stock Heads)

    S&S Cycle

    $1,345.95
    S&S Cycle - 910-0500 - Black Powdercoat 107" Big Bore Kit - Fits All '07-'17 Twin Cam Models (3.937" Bore, 4⅜" Stroke, 10.5:1 Comp. W/ Stock Heads) Fits: All '07-'17 Twin Cam Models (3.937" Bore, 4⅜"...
    $1,345.95
    Qty in Cart: 0
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    $1,345.95
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  • S&S Cycle - Silver Powdercoat 107" Big Bore Kit fits All '07-'17 Twin Cam Models (3.937" Bore, 4⅜" Stroke, 10.5:1 Comp. W/ Stock Heads)

    S&S Cycle - 910-0480 - Silver Powdercoat 107" Big Bore Kit - Fits All '07-'17 Twin Cam Models (3.937" Bore, 4⅜" Stroke, 10.5:1 Comp. W/ Stock Heads)

    S&S Cycle

    $1,345.95
    S&S Cycle - 910-0480 - Silver Powdercoat 107" Big Bore Kit - Fits All '07-'17 Twin Cam Models (3.937" Bore, 4⅜" Stroke, 10.5:1 Comp. W/ Stock Heads) Fits: All '07-'17 Twin Cam Models (3.937" Bore,...
    $1,345.95
    Qty in Cart: 0
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    $1,345.95
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  • S&S Cycle - Black Powdercoat 98" Big Bore Kit fits '99-'06 Twin Cam Engines (3.937" Bore, 4" Stroke, 9.8:1 Comp. W/ Stock Heads)

    S&S Cycle - 910-0481 - Black Powdercoat 98" Big Bore Kit - Fits '99-'06 Twin Cam Engines (3.937" Bore, 4" Stroke, 9.8:1 Comp. W/ Stock Heads)

    S&S Cycle

    $1,386.95
    S&S Cycle - 910-0481 - Black Powdercoat 98" Big Bore Kit - Fits '99-'06 Twin Cam Engines (3.937" Bore, 4" Stroke, 9.8:1 Comp. W/ Stock Heads) Fits: '99-'06 Twin Cam Engines (3.937" Bore, 4" Stroke, 9...
    $1,386.95
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    $1,386.95
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  • S&S Cycle - Silver Powdercoat 98" Big Bore Kit fits '99-'06 Twin Cam Engines (3.937" Bore, 4" Stroke, 9.8:1 Comp. W/ Stock Heads)

    S&S Cycle - 910-0482 - Silver Powdercoat 98" Big Bore Kit - Fits '99-'06 Twin Cam Engines (3.937" Bore, 4" Stroke, 9.8:1 Comp. W/ Stock Heads)

    S&S Cycle

    $1,358.95
    S&S Cycle - 910-0482 - Silver Powdercoat 98" Big Bore Kit - Fits '99-'06 Twin Cam Engines (3.937" Bore, 4" Stroke, 9.8:1 Comp. W/ Stock Heads) Fits: '99-'06 Twin Cam Engines (3.937" Bore, 4" Stroke,...
    $1,358.95
    Qty in Cart: 0
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    $1,358.95
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  • 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 - 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

    $1,643.95
    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) This Big Bore Kit produces outstanding outcomes with stock...
    $1,643.95
    Qty in Cart: 0
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    $1,643.95
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  • S&S Cycle - Black 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 - Black 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

    $1,643.95
    S&S Cycle - Black 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...
    $1,643.95
    Qty in Cart: 0
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    $1,643.95
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  • S&S Cycle - 3⅝" Big Bore Cylinder & Big Bore Piston Kit fits '66-'84 Shovelhead Engines

    S&S Cycle - 3⅝" Big Bore Cylinder & Big Bore Piston Kit fits '66-'84 Shovelhead Engines

    S&S Cycle

    MSRP: $1,999.95
    $1,995.95
    S&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...
    MSRP: $1,999.95
    $1,995.95
    Qty in Cart: 0
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    MSRP: $1,999.95
    $1,995.95
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  • S&S Cycle - Wrinkle Black 100" Bolt-In Sidewinder® 4" Big Bore Kit fits '99-'06 Twin Cam Engines

    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
    $1,540.95
    S&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...
    MSRP: $1,550.95
    $1,540.95
    Qty in Cart: 0
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    MSRP: $1,550.95
    $1,540.95
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  • S&S Cycle - Silver 110" Bolt-In Sidewinder® 4" Big Bore Kit fits '07-'17 Twin Cam Engines

    S&S Cycle - Silver 110" Bolt-In Sidewinder® 4" Big Bore Kit fits '07-'17 Twin Cam Engines

    S&S Cycle

    $1,540.95
    S&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...
    $1,540.95
    Qty in Cart: 0
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    $1,540.95
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  • S&S Cycle - Silver XL883 to 1200 Conversion Kit fits '86-'20 XL 883 Models

    S&S Cycle - Silver XL883 to 1200 Conversion Kit fits '86-'20 XL 883 Models

    S&S Cycle

    $1,128.95
    S&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...
    $1,128.95
    Qty in Cart: 0
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    $1,128.95
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  • S&S Cycle - Hooligan Kits fits '00-'20 XL Models S&S Cycle - Hooligan Kits fits '00-'20 XL Models

    S&S Cycle - Hooligan Kits fits '00-'20 XL Models

    S&S Cycle

    MSRP: $1,999.95
    $1,822.95
    S&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...
    MSRP: $1,999.95
    $1,822.95
    Qty in Cart: 0
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    MSRP: $1,999.95
    $1,822.95
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  • S&S Cycle - 100" Power Packages fits '99-'06 Twin Cam Engines (Exc. '06 Dynas) S&S Cycle - 100" Power Packages fits '99-'06 Twin Cam Engines (Exc. '06 Dynas)

    S&S Cycle - 100" Power Packages fits '99-'06 Twin Cam Engines (Exc. '06 Dynas)

    S&S Cycle

    $3,396.95
    S&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
    Qty in Cart: 0
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    $3,396.95
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  • Out of stock
    V-Twin - 11-0075 - 95 inch Big Bore Twin Cam Cylinder and Piston Kit V-Twin - 11-0075 - 95 inch Big Bore Twin Cam Cylinder and Piston Kit

    V-Twin - 11-0075 - 95 inch Big Bore Twin Cam Cylinder and Piston Kit

    Motorshop

    $470.64
    V-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
    Qty in Cart: 0
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    $470.64
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  • Out of stock
    V-Twin - 107" Big Bore Twin Cam Cylinder Kit fits '99-'06 FLST/FXST/FLT/FXD Model

    V-Twin - 107" Big Bore Twin Cam Cylinder Kit fits '99-'06 FLST/FXST/FLT/FXD Model

    V-Twin Mfg

    $786.03
    V-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
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    $786.03
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  • Out of stock
    Cometic - C10218 - Top End Kit M8 4.00" 114Cu Cvo .040"H/G

    Cometic - C10218 - Top End Kit M8 4.00" 114Cu Cvo .040"H/G

    Cometic

    $238.10
    Cometic - 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
    Qty in Cart: 0
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    $238.10
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  • Out of stock
    Cometic - C10218-030 - Top End Kit M8 4.00" 114Cu Cvo .030"H/G

    Cometic - C10218-030 - Top End Kit M8 4.00" 114Cu Cvo .030"H/G

    Cometic

    $238.10
    Cometic - 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
    Qty in Cart: 0
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    $238.10
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  • Out of stock
    Cometic - C10219-030 - Top End Kit M8 4.075" 114Cu .030"H/G

    Cometic - C10219-030 - Top End Kit M8 4.075" 114Cu .030"H/G

    Cometic

    $238.10
    Cometic - 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
    Qty in Cart: 0
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    $238.10
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  • Out of stock
    Cometic Top End Kit M8 4.125" 117Cu .040"H/G C10220

    Cometic - C10220 - Top End Kit M8 4.125" 117Cu .040"H/G

    Cometic

    $238.10
    Cometic - 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
    Qty in Cart: 0
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    $238.10
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  • Out of stock
    Cometic - C10221 - Top End Kit M8 4.185" 120Cu .040"H/G

    Cometic - C10221 - Top End Kit M8 4.185" 120Cu .040"H/G

    Cometic

    $238.10
    Cometic - 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
    Qty in Cart: 0
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    $238.10
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  • Out of stock
    Cometic - C10221-030 - Top End Kit M8 4.185" 120Cu .030"H/G

    Cometic - C10221-030 - Top End Kit M8 4.185" 120Cu .030"H/G

    Cometic

    $238.10
    Cometic - 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
    Qty in Cart: 0
    Quantity:
    Price:
    $238.10
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  • Out of stock
    Cometic - C10222 - Top End Kit M8 4.200" 121Cu .040"H/G

    Cometic - C10222 - Top End Kit M8 4.200" 121Cu .040"H/G

    Cometic

    $238.10
    Cometic - 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
    Qty in Cart: 0
    Quantity:
    Price:
    $238.10
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  • Out of stock
    Cometic - C10222-030 - Top End Kit M8 4.200" 121Cu .030"H/G

    Cometic - C10222-030 - Top End Kit M8 4.200" 121Cu .030"H/G

    Cometic

    $238.10
    Cometic - 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
    Qty in Cart: 0
    Quantity:
    Price:
    $238.10
    Subtotal:
  • Out of stock
    Cometic - C10223 - Top End Kit M8 4.250" 124Cu .040"H/G C Only

    Cometic - C10223 - Top End Kit M8 4.250" 124Cu .040"H/G C Only

    Cometic

    $238.10
    Cometic - 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
    Qty in Cart: 0
    Quantity:
    Price:
    $238.10
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  • Out of stock
    Cometic - C10223-030 - Top End Kit M8 4.250" 124Cu .030"H/G C Only

    Cometic - C10223-030 - Top End Kit M8 4.250" 124Cu .030"H/G C Only

    Cometic

    $238.10
    Cometic - 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
    Qty in Cart: 0
    Quantity:
    Price:
    $238.10
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  • Out of stock
    Cometic - C10224 - M8 4.320" 128Cu T/E Kit040" H/G Oe#25700729 Cometic - C10224 - M8 4.320" 128Cu T/E Kit040" H/G Oe#25700729

    Cometic - C10224 - M8 4.320" 128Cu T/E Kit040" H/G Oe#25700729

    Cometic

    $238.10
    Cometic - C10224 - M8 4.320" 128Cu T/E Kit040" H/G Oe#25700729FeaturesFitment2018-2021Harley DavidsonFLHR Road King2018-2021Harley Davids
    $238.10
    Qty in Cart: 0
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    $238.10
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  • Out of stock
    V-Twin - 11-0510 - Big Bore Gasket and Parts Kit V-Twin - 11-0510 - Big Bore Gasket and Parts Kit

    V-Twin - 11-0510 - Big Bore Gasket and Parts Kit

    Motorshop

    $100.93
    V-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
    Qty in Cart: 0
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    $100.93
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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.