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Engine & Performance

Choose from Engine & Performance products for Harley-Davidson, American V-twin and compatible motorcycle applications. Across the range you will find products for engine components. Compatibility varies, so match the stated model, year and technical details before ordering.

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£50.90
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£46.26

Colony Primary Cover Mount Kit – 2007–2017 Softail

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Colony Primary Cover Mount Kit – 2007–2017 Softail Acorn Fitment 07-17 Softail (Excl. 08-11 FXCW/C; 13-17 FXSB) (NU) Product Details Brand: Colon...

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£50.90
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£50.90
£46.26
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£46.26
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£62.36
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£62.36
£57.07
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£57.07

Colony Primary Cover Mount Kit – 2006–2017 Dyna

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Colony Primary Cover Mount Kit – 2006–2017 Dyna Acorn Fitment 06-17 Dyna (NU) Product Details Brand: Colony Category: MOTOR PARTS > CYLINDERS...

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£62.36
£57.07
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£53.75
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£53.75
£48.85
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£48.85

Colony Primary Cover Mount Kit – 1989–2006 Softail; 1991–2005 Dyna

Out of stock

Colony Primary Cover Mount Kit – 1989–2006 Softail; 1991–2005 Dyna Acorn Fitment 89-06 Softail; 91-05 Dyna (NU) Product Details Brand: Colony Ca...

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£53.75
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£53.75
£48.85
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£48.85
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£47.19
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£47.19
£42.89
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£42.89

Colony Primary Cover Mount Kit. Acorn – 1985–1994 FXR; 1985–1999 FLT/Touring

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Colony Primary Cover Mount Kit. Acorn – 1985–1994 FXR; 1985–1999 FLT/Touring Colony primary cover mount kit. Acorn Fitment 85-94 FXR; 85-99 FLT/Tou...

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£47.19
£47.19 - £47.19
£47.19
£42.89
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£42.89
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£19.53
£22.50
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£22.50

Colony Primary Cover Mount Kit – 1965–1979 Big Twin with Accessory Type…

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Colony Primary Cover Mount Kit – 1965–1979 Big Twin with Accessory Type… Acorn Fitment 65-79 Big Twin (NU) with accessory type pressed metal primar...

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£19.53
£22.50
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£22.50
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£46.69
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£42.43
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£42.43

Colony Primary Cover Mount Kit – 1970–1986 4-Speed Big Twin

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Colony Primary Cover Mount Kit – 1970–1986 4-Speed Big Twin Acorn Fitment 70-86 4-speed Big Twin (NU) Product Details Brand: Colony Category: MO...

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£46.69
£42.43
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£42.43
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£34.69
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£34.69
£34.26
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£34.26

Colony Primary Cover Mount Kit – 1965–1969 Big Twin

Out of stock

Colony Primary Cover Mount Kit – 1965–1969 Big Twin Acorn; for alu cover Fitment 65-69 Big Twin (NU) Product Details Brand: Colony Category: MOT...

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£34.69
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£34.69
£34.26
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£34.26
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£63.36
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£63.36
£58.00
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£58.00

Colony Head Bolt Kit – 1940–1947 KNUCKLEHEAD

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Colony Head Bolt Kit – 1940–1947 KNUCKLEHEAD Cap style Fitment 40-47 KNUCKLEHEAD (NU) Product Details Brand: Colony Category: MOTOR PARTS > H...

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£63.36
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£58.00
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Colony Head Bolt Kit – 1948–1983 Big Twin

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Colony Head Bolt Kit – 1948–1983 Big Twin Cap style; chrome plated Fitment 48-83 (NU) Big Twin Product Details Brand: Colony Category: MOTOR PAR...

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£63.36
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£63.36
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£27.23
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£27.23
£26.65
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Colony Head Bolt Cover Kit. Cap Style, Chrome – 84-E85 Evo Big Twin

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Colony Head Bolt Cover Kit. Cap Style, Chrome – 84-E85 Evo Big Twin Fits over the OEM head bolts. Securely mounts to the head bolt with a set-screw...

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£27.23
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£27.23
£26.65
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£39.03
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£38.20
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£38.20

Colony Front Motor Mount Kits – 1991–2017 Dyna

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Colony Front Motor Mount Kits – 1991–2017 Dyna Chrome acorn Fitment 91-17 Dyna (NU) Product Details Brand: Colony Category: MOTOR PARTS > MOT...

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£39.03
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£39.03
£38.20
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£38.20
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£18.75
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£18.75
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£18.35

Colony Motor Mount Bolt Kit. Acorn. Upper – 1936–1984 Big Twin

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Colony Motor Mount Bolt Kit. Acorn. Upper – 1936–1984 Big Twin Used to mount top engine mount to engine and to the frame tab. With custom chrome pl...

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£18.75
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£18.35
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Colony Motor Mount Bolt Kit. Acorn. Lower – 1936–1984 Big Twin

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Colony Motor Mount Bolt Kit. Acorn. Lower – 1936–1984 Big Twin Used to mount engine case to frame. With custom chrome plated Acorn nuts.Note: See 9...

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£29.88
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£26.37
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£26.37
£25.81
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£25.81

Colony Tappet Block Mount Kit. Acorn, Chrome – 36-E76 Big Twin. With L1976–1984 Style…

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Colony Tappet Block Mount Kit. Acorn, Chrome – 36-E76 Big Twin. With L1976–1984 Style… Conversion kit. 1/4-24 threaded bolts. Used to fit L76-84 ta...

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£26.37
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£26.37
£25.81
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£24.62
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£24.62
£24.09
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£24.09

Colony Tappet Block Mount Kit. Acorn, Chrome – L1976–1999 Big Twin

Out of stock

Colony Tappet Block Mount Kit. Acorn, Chrome – L1976–1999 Big Twin Colony, tappet block mount kit. Acorn, chrome Fitment L76-99 Big Twin (NU) (Excl...

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£24.62
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£24.62
£24.09
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£63.36
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£63.36
£58.00
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£58.00

Colony Head Bolt Kit – 1940–1947 KNUCKLEHEAD

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Colony Head Bolt Kit – 1940–1947 KNUCKLEHEAD Acorn style Fitment 40-47 KNUCKLEHEAD (NU) Product Details Brand: Colony Category: MOTOR PARTS >...

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£63.36
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£63.36
£58.00
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£58.00
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£63.36
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£63.36
£58.00
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£58.00

Colony Head Bolt Kit – 1936–1939 KNUCKLEHEAD

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Colony Head Bolt Kit – 1936–1939 KNUCKLEHEAD Acorn style Fitment 36-39 KNUCKLEHEAD (NU) Product Details Brand: Colony Category: MOTOR PARTS >...

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£63.36
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£63.36
£58.00
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£58.00
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£63.36
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£63.36
£58.00
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£58.00

Colony Head Bolt Kit – 1948–1983 Big Twin

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Colony Head Bolt Kit – 1948–1983 Big Twin Acorn style Fitment 48-83 (NU) Big Twin Product Details Brand: Colony Category: MOTOR PARTS > HEAD ...

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£63.36
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£63.36
£58.00
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£164.78
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£164.78
£162.49
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£162.49

Gardner-Westcott Head Bolt Kit – 1940–1947 74" (1200CC) KNUCKLE

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Gardner-Westcott Head Bolt Kit – 1940–1947 74" (1200CC) KNUCKLE Chrome allenhead; incl. washers Fitment 40-47 74" (1200CC) KNUCKLE (NU) Product Det...

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£164.78
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£164.78
£162.49
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£162.49
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£11.02
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£11.02
£10.86
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£10.86

James Gaskets Manifold Gasket Conversion Kit – H-D with a Linkert to Bendix/Keihin…

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James Gaskets Manifold Gasket Conversion Kit – H-D with a Linkert to Bendix/Keihin… Gasket set for when the bike is converted from a Linkert to a B...

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£11.02
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£11.02
£10.86
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£86.99
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£86.99
£82.82
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£82.82

Gardner-Westcott Crankcase Bolt Kit, Allen – 2004–2022 XL Sportster

Out of stock

Gardner-Westcott Crankcase Bolt Kit, Allen – 2004–2022 XL Sportster Mounts crankcase halves together. Kits come complete with washers; studs and nu...

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£86.99
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£82.82
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£29.96
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£29.53
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Jims Relief Valve Oil Pump – L1982–2017 Twin Cam; L2017–2025 M8…

Out of stock

Jims Relief Valve Oil Pump – L1982–2017 Twin Cam; L2017–2025 M8… Fits OEM oil pumps; S&S (HVHP) oil pumps & S&S Twin Cam oil pump. OEM ...

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£29.53
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£5.19
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£5.19
£4.77
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£4.77

Jims Spring, Oil Pump Check Valve – 1981–1999 Big Twin

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Jims Spring, Oil Pump Check Valve – 1981–1999 Big Twin OEM replacement reference 26262-80. Fitment 81-99 Big Twin (Excl. Twin Cam) (NU) Product Det...

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£5.19
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£5.19
£4.77
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£4.77
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£7.68
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£7.06
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Jims Spring Oil Pump Relief Valve – 1973–1999 Big Twin

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Jims Spring Oil Pump Relief Valve – 1973–1999 Big Twin Jims, spring oil pump relief valve Fitment 73-99 Big Twin (NU) (Excl. TC) Product Details ...

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£7.68
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£7.06
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