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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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£75.61
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Jims Rocker Arm Bushing Set – 1984–2017 Big Twin; 1986–2022 XL…

Only 2 left!

Jims Rocker Arm Bushing Set – 1984–2017 Big Twin; 1986–2022 XL… Manufactured from solid bearing bronze bar. .555" I.D. Must be reamed to fit. Not s...

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£75.61
£74.55
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£85.08
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Jims Rocker Arm Bushing Set – 1966–1984 Shovelhead; 1957–1985 XL…

Only 2 left!

Jims Rocker Arm Bushing Set – 1966–1984 Shovelhead; 1957–1985 XL… Manufactured from solid bearing bronze bar. .547" I.D. Must be reamed to fit. Slo...

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£127.21
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MCS Sprocket Shaft Bearing Assembly – 1955–1968 Big Twin

Only 3 left!

MCS Sprocket Shaft Bearing Assembly – 1955–1968 Big Twin Sprocket shaft bearing assembly Fitment 55-68 Big Twin (NU) Product Details Brand: MCS ...

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£127.21
£126.35
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£42.87
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MCS FL 2-1 Exhaust Header Heatshield. Lower Right, Rear – Fits Stock 2 in 1 Exhaust Systems on…

Only 3 left!

MCS FL 2-1 Exhaust Header Heatshield. Lower Right, Rear – Fits Stock 2 in 1 Exhaust Systems on… Chrome replica style replacement; lower right rear ...

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£42.87
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£42.65
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£42.65
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£35.87
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£33.30
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MCS Lower Pushrod Cover Kit. 84-99. Chrome – 1984–1999 Evo Big Twin; 1986–1990 XL…

Only 1 left!

MCS Lower Pushrod Cover Kit. 84-99. Chrome – 1984–1999 Evo Big Twin; 1986–1990 XL… Chrome plated steel. OEM style reproduction. For OEM style o-rin...

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£33.30
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£33.30
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MCS Universal 3" Baffle 12" Long

in stock

MCS Universal 3" Baffle 12" Long Universal fit for most 3" (7.6 cm) diameter mufflers. Includes sound damping material. Approximate dimensions: 7.2...

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£41.90
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James Gaskets Carburetor Mount Kit. Keihin Butterfly – 1978–1989 Big Twin with Stock Butterfly…

Only 2 left!

James Gaskets Carburetor Mount Kit. Keihin Butterfly – 1978–1989 Big Twin with Stock Butterfly… Includes a manifold spacer with 1.810" (46mm) I.D. ...

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£29.25
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£28.84
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£28.84
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£16.23
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James Gaskets Rocker Box Washers. Steel with Bonded Rubber – 2009–2022 XL Sportster; 2008–2012 XR1200

Only 3 left!

James Gaskets Rocker Box Washers. Steel with Bonded Rubber – 2009–2022 XL Sportster; 2008–2012 XR1200 OEM style rocker cover washers. Bonded sealin...

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James Gaskets Rocker Box Cover Seal Washer Kit. RCM – 1984–1999 Evo Big Twin; 1986–2008 XL…

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James Gaskets Rocker Box Cover Seal Washer Kit. RCM – 1984–1999 Evo Big Twin; 1986–2008 XL… RCM (Rubber Coated Metal). Rubber on steel rocker cover...

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James Gaskets Rocker Box Cover Seal Washer Kit. Copper – 1984–1999 Evo Big Twin; 1986–2008 XL…

Only 3 left!

James Gaskets Rocker Box Cover Seal Washer Kit. Copper – 1984–1999 Evo Big Twin; 1986–2008 XL… Copper material. Rocker covers seal washers. 8-piece...

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£7.04
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James Gaskets Rocker Box Cover Seal Washer Kit. Fiber – 1984–1999 Evo Big Twin; 1986–2008 XL…

Only 2 left!

James Gaskets Rocker Box Cover Seal Washer Kit. Fiber – 1984–1999 Evo Big Twin; 1986–2008 XL… Fiber material. Rocker covers seals. 8-piece kit for ...

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£6.46
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£27.54
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MCS Intake Clamps Heavy Duty, Chrome – L1978–1984 Big Twin; L1978–1985 XL…

Only 3 left!

MCS Intake Clamps Heavy Duty, Chrome – L1978–1984 Big Twin; L1978–1985 XL… Band type Fitment L78-84 Big Twin; L78-85 XL Sportster (NU) (band type) ...

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£27.54
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£19.37
£21.12
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MCS XL Sportster Header Clamps. Chrome – 1957–1985 XL Sportster

Only 3 left!

MCS XL Sportster Header Clamps. Chrome – 1957–1985 XL Sportster Chrome plated steel. OEM style replacement. Used to mount exhaust to cylinder heads...

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£19.37
£21.12
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£21.12
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£16.37
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£16.37
£15.59
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£15.59

MCS Thrust Washer Camshaft. .095" – 1936–1999 Big Twin

Only 2 left!

MCS Thrust Washer Camshaft. .095" – 1936–1999 Big Twin Shims used to achieve correct cam end-play. Approx. dimensions: 1.062" OD; .820" ID. Fitment...

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£15.59
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£27.52
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£27.14
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£27.14

James Gaskets Manifold Cap / MAP Sensor Plug Set. 40-Piece

Only 3 left!

James Gaskets Manifold Cap / MAP Sensor Plug Set. 40-Piece 40-piece set; containing 4 different plugs. Will solve most plugging needs. Includes 10 ...

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£27.52
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£27.52
£27.14
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£27.14
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£164.74
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£164.74
£162.44
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£162.44

Jims Pinion Shaft. L81-99 B.T. - Special

Only 3 left!

Jims Pinion Shaft. L81-99 B.T. - Special Fits L81-99 Evo B.T. with aftermarket flywheels equipped with 73-89 style oil pump & pinion gears. Sam...

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£164.74
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£164.74
£162.44
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£162.44
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£159.77
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£159.77
£157.54
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£157.54

Jims Pinion Shaft. 87-89 B.T – 1987–1989 Big Twin

Only 3 left!

Jims Pinion Shaft. 87-89 B.T – 1987–1989 Big Twin Use 24016-80 JIMS nut (MCS 978261) for flywheel side. Use 24023-54 JIMS nut (MCS 978263) on pinio...

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£159.77
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£159.77
£157.54
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£157.54
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£226.37
£228.10
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£228.10

Jims Pinion Shaft Kit – L1981–1986 Big Twin

Only 1 left!

Jims Pinion Shaft Kit – L1981–1986 Big Twin End oiling. Same as MCS 507281 JIMS pinion shaft; but complete as kit. This kit includes all parts that...

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£226.37
£228.10
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£159.77
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£159.77
£157.54
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£157.54

Jims Pinion Shaft. L81-86 B.T – L1981–1986 Big Twin

Only 3 left!

Jims Pinion Shaft. L81-86 B.T – L1981–1986 Big Twin Use 11218 key (MCS 517951). Use 24016-80 JIMS nut (MCS 978261) for flywheel side. Use 24023-54 ...

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£159.77
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£159.77
£157.54
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£157.54
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£178.80
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£178.80
£177.56
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£177.56

Andrews Shovel Adj. Aluminum Pushrod Set – 1966–1984 SHOVEL WITH OEM HYDRAULIC…

Only 2 left!

Andrews Shovel Adj. Aluminum Pushrod Set – 1966–1984 SHOVEL WITH OEM HYDRAULIC… Available in chromoly steel and aluminum. Chromoly pushrods are thi...

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£178.80
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£178.80
£177.56
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£177.56
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£54.27
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£49.95
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MCS Flatside Gas Tank Mount Kit – 1984–1999 Softail; 1985–1986 FXWG

Only 3 left!

MCS Flatside Gas Tank Mount Kit – 1984–1999 Softail; 1985–1986 FXWG Complete installation hardware kit to mount the flat side fuel tanks as used on...

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£49.95
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£38.30
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£38.30

James Gaskets Cylinder Head Gasket Set. .045" Firering (Pr) – 1966–1984 Shovelhead

Only 3 left!

James Gaskets Cylinder Head Gasket Set. .045" Firering (Pr) – 1966–1984 Shovelhead .045" reinforced graphite with Firering and silicone bead. Fits ...

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£38.00
£38.30
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James Gaskets Gasket Cylinder Head. .045" Paper – 1966–1984 Shovelhead

Only 3 left!

James Gaskets Gasket Cylinder Head. .045" Paper – 1966–1984 Shovelhead .045" blue PTFE coated fiber reinforced paper. Final crush .042". Fits both ...

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James Gaskets Cylinder Head Gasket. .045" Paper/PTFE – 1957–1971 XL900

Only 2 left!

James Gaskets Cylinder Head Gasket. .045" Paper/PTFE – 1957–1971 XL900 .045" thick PTFE coated paper. Final crush .042". Standard 3.00" bore. OEM r...

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