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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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£18.06 - £18.06
£18.06
£19.56
£19.56 - £19.56
£19.56

Jims Pushrod Cover Spacer Set. .155" Thick – 1936–2025 Big Twin; 1957–1990 XL…

Only 2 left!

Jims Pushrod Cover Spacer Set. .155" Thick – 1936–2025 Big Twin; 1957–1990 XL… Used to space-out stock length pushrod covers when longer than stock...

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£18.06 - £18.06
£18.06
£19.56
£19.56 - £19.56
£19.56
£18.06 - £18.06
£18.06
£19.56
£19.56 - £19.56
£19.56

Jims Pushrod Cover Spacer Set. .275" Thick – 1936–2025 Big Twin; 1957–1990 XL…

Only 2 left!

Jims Pushrod Cover Spacer Set. .275" Thick – 1936–2025 Big Twin; 1957–1990 XL… Used to space-out stock length pushrod covers when longer than stock...

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£18.06 - £18.06
£18.06
£19.56
£19.56 - £19.56
£19.56
£456.80 - £456.80
£456.80
£460.30
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£460.30

Jims Valve Spring Kit, Race. Titanium .675" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin…

Only 2 left!

Jims Valve Spring Kit, Race. Titanium .675" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin… Race valve spring set. Titanium top collars. Kits includ...

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£456.80 - £456.80
£456.80
£460.30
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£323.33 - £323.33
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£325.81
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£325.81

Jims Valve Spring Kit. Titanium .600" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin…

Only 2 left!

Jims Valve Spring Kit. Titanium .600" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin… Street & Performance. Titanium top collars. Kits include t...

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£323.33 - £323.33
£323.33
£325.81
£325.81 - £325.81
£325.81
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£47.05
£47.05 - £47.05
£47.05
£46.39
£46.39 - £46.39
£46.39

Jims Pinion Shaft Bushing. +.005" – 1936–1953 Big Twin

Only 3 left!

Jims Pinion Shaft Bushing. +.005" – 1936–1953 Big Twin Bronze. O.D. 1.0020". Used in cam cover. Oversized replacement for standard sized OEM 25582-...

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£47.05
£47.05 - £47.05
£47.05
£46.39
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£46.39
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£925.70
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£925.70
£796.08
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Jims ''A Cut Above'' Billet Cam Cover L73-92 B.T. Polished – L1973–1992 Big Twin

Only 2 left!

Jims ''A Cut Above'' Billet Cam Cover L73-92 B.T. Polished – L1973–1992 Big Twin Hidden mount screws; billet 7075-T651 aluminum and exact positioni...

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£925.70
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£925.70
£796.08
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£61.25
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£61.25
£58.31
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£58.31

Gardner-Westcott Rocker Box Top Bolt Kit. Flanged Hex, Chrome – 1999–2017 Twin Cam

Only 2 left!

Gardner-Westcott Rocker Box Top Bolt Kit. Flanged Hex, Chrome – 1999–2017 Twin Cam Chrome. Flanged domed hex head bolts. Includes washers. Fitment ...

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£61.25
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£61.25
£58.31
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£58.31
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£8.00
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£8.00
£6.90
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£6.90

Gardner-Westcott Intake Manifold Mount Kit – 1990–1994 Big Twin

Only 1 left!

Gardner-Westcott Intake Manifold Mount Kit – 1990–1994 Big Twin Chrome Fitment 90-94 Big Twin (NU) Product Details Brand: Gardner-Westcott Categ...

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£8.00
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£8.00
£6.90
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£7.44
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£6.42
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£6.42

Gardner-Westcott Exhaust Mount Kit. Chrome Allen – 1966–1984 Shovel

Only 1 left!

Gardner-Westcott Exhaust Mount Kit. Chrome Allen – 1966–1984 Shovel Incl. 4 chrome chrome allen head bolts; washers & gaskets. Used to mount ex...

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£7.44
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£7.44
£6.42
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£13.97
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£13.97
£12.05
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£12.05

Gardner-Westcott CV Carburetor Top Cover Mount Kit. Chrome – 1988–2006 H-D with CV Carburetor

Out of stock

Gardner-Westcott CV Carburetor Top Cover Mount Kit. Chrome – 1988–2006 H-D with CV Carburetor Chrome plated allen head (socket head) bolt kit. Incl...

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£13.97
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£13.97
£12.05
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£12.05
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£5.54
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£5.54
£4.64
£4.64 - £4.64
£4.64

Gardner-Westcott Aircleaner Cover Mount Bolts – 1979–1985 FL; FX; XL Sportster

Only 2 left!

Gardner-Westcott Aircleaner Cover Mount Bolts – 1979–1985 FL; FX; XL Sportster Chrome; allen head; 3-bolt set for the OEM style Ham Can style air c...

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£5.54
£5.54 - £5.54
£5.54
£4.64
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£4.64
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£33.11
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£33.11
£32.65
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£32.65

James Gaskets Primary Cover Gasket Kit. Silicone – 1991–2003 XL Sportster

Only 3 left!

James Gaskets Primary Cover Gasket Kit. Silicone – 1991–2003 XL Sportster Complete primary cover gasket kit for Sportster models. Includes a .031" ...

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£33.11
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£33.11
£32.65
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£33.11
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£33.11
£32.65
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£32.65

James Gaskets Primary Cover Gasket Kit. Silicone – 1977–1990 XL Sportster

Only 3 left!

James Gaskets Primary Cover Gasket Kit. Silicone – 1977–1990 XL Sportster Complete primary cover gasket kit for Sportster models. Includes a .031" ...

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£33.11
£33.11 - £33.11
£33.11
£32.65
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£32.65
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£72.66 - £72.66
£72.66
£73.22
£73.22 - £73.22
£73.22

James Gaskets Primary Cover Gasket & Seal Kit. Inner/Outer – 1994–2006 FLT/Touring; 1994 FXR

Only 4 left!

James Gaskets Primary Cover Gasket & Seal Kit. Inner/Outer – 1994–2006 FLT/Touring; 1994 FXR With silicone beaded 0.062" paper primary cover; d...

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£72.66 - £72.66
£72.66
£73.22
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£73.22
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£30.85
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£30.85
£30.47
£30.47 - £30.47
£30.47

Colony High-torque – 1936–1984 Big Twin

Only 3 left!

Colony High-torque – 1936–1984 Big Twin Black oxide; no washers; provides extra space for big bore cilinders but fits stock bore cylinders equally ...

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£30.85
£30.85 - £30.85
£30.85
£30.47
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£30.47
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£93.11 - £93.11
£93.11
£93.82
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£93.82

James Gaskets Primary Cover Gasket & Seal Kit. Outer – 1989–1993 Softail; 1991–1993 Dyna

Only 3 left!

James Gaskets Primary Cover Gasket & Seal Kit. Outer – 1989–1993 Softail; 1991–1993 Dyna With silicone beaded paper primary cover and inspectio...

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£93.11 - £93.11
£93.11
£93.82
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£93.82
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£74.77
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£74.77
£72.19
£72.19 - £72.19
£72.19

Jagg Braided 3/8" Oil Hose Upgrade Kit. Black

Out of stock

Jagg Braided 3/8" Oil Hose Upgrade Kit. Black Includes 3ft. of black fiber braided oil hose; that can be trimmed for length. Hardware includes oil ...

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£74.77
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£74.77
£72.19
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£72.19
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£74.77
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£74.77
£72.19
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£72.19

Jagg Braided 3/8" Oil Hose Upgrade Kit. Silver

Only 2 left!

Jagg Braided 3/8" Oil Hose Upgrade Kit. Silver Includes 3ft. of silver stainless braided hose; that can be trimmed for length. Hardware includes oi...

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£74.77
£74.77 - £74.77
£74.77
£72.19
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£72.19
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£583.52 - £583.52
£583.52
£588.01
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£588.01

Jagg Oil Cooler Kit. Low Mount - Horizontal - 10 Row - Fan – 2009–2016 FLT/Touring

Out of stock

Jagg Oil Cooler Kit. Low Mount - Horizontal - 10 Row - Fan – 2009–2016 FLT/Touring Black. With FAN assisted forced cooling that supply a 50mph (80k...

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£583.52 - £583.52
£583.52
£588.01
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£588.01
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£583.52 - £583.52
£583.52
£588.01
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£588.01

Jagg Oil Cooler Kit. Low Mount - Horizontal - 10 Row - Fan – 1984–2008 FLT/Touring

Only 3 left!

Jagg Oil Cooler Kit. Low Mount - Horizontal - 10 Row - Fan – 1984–2008 FLT/Touring Black. With FAN assisted forced cooling that supply a 50mph (80k...

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£583.52 - £583.52
£583.52
£588.01
£588.01 - £588.01
£588.01
Sold out
£583.52 - £583.52
£583.52
£588.01
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£588.01

Jagg Oil Cooler Kit. Low Mount - Horizontal - 10 Row - Fan – 1991–2017 Dyna

Out of stock

Jagg Oil Cooler Kit. Low Mount - Horizontal - 10 Row - Fan – 1991–2017 Dyna Black. With FAN assisted forced cooling that supply a 50mph (80km/h) br...

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£583.52 - £583.52
£583.52
£588.01
£588.01 - £588.01
£588.01
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£456.84 - £456.84
£456.84
£460.35
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£460.35

Jagg Oil Cooler Kit. Low Mount - Horizontal - 10 Row – 2009–2016 FLT/Touring

Out of stock

Jagg Oil Cooler Kit. Low Mount - Horizontal - 10 Row – 2009–2016 FLT/Touring Black. Horizontal frame mounted. Non-fan assisted. Kit includes the oi...

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£456.84 - £456.84
£456.84
£460.35
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£460.35
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£456.84 - £456.84
£456.84
£460.35
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£460.35

Jagg Oil Cooler Kit. Low Mount - Horizontal - 10 Row – 1991–2017 Dyna

Out of stock

Jagg Oil Cooler Kit. Low Mount - Horizontal - 10 Row – 1991–2017 Dyna Black. Horizontal frame mounted. Non-fan assisted. Kit includes the oil coole...

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£456.84 - £456.84
£456.84
£460.35
£460.35 - £460.35
£460.35
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£405.96 - £405.96
£405.96
£409.08
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£409.08

Jagg Oil Cooler Kit. Low Mount - Horizontal - 6 Row – 2000–2017 Softail

Out of stock

Jagg Oil Cooler Kit. Low Mount - Horizontal - 6 Row – 2000–2017 Softail Black. Non-fan assisted. Horizontal frame mounted. Kit includes the oil coo...

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£405.96 - £405.96
£405.96
£409.08
£409.08 - £409.08
£409.08
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