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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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£72.69 - £72.69
£72.69
£73.25
£73.25 - £73.25
£73.25

James Gaskets Cylinder Head & Base Gasket Kit. 3-7/8" Bore MLS – 1999–2017 95"/103" Twin Cam

Only 3 left!

James Gaskets Cylinder Head & Base Gasket Kit. 3-7/8" Bore MLS – 1999–2017 95"/103" Twin Cam Kit to service one engine. Includes two .045" MLS ...

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£72.69 - £72.69
£72.69
£73.25
£73.25 - £73.25
£73.25
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£33.84
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£33.84
£33.37
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£33.37

James Gaskets Cylinder Head & Base Gasket Kit. 3-7/8" Bore – 1999–2017 95"/103" Twin Cam

Only 3 left!

James Gaskets Cylinder Head & Base Gasket Kit. 3-7/8" Bore – 1999–2017 95"/103" Twin Cam Kit to service one engine. Includes two .036" BLUE PTF...

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£33.84
£33.84 - £33.84
£33.84
£33.37
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£33.37
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£118.35 - £118.35
£118.35
£121.03
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£121.03

James Gaskets Top End Gasket Kit. Twin Cam. PTFE – 1999–2004 88" 1450cc Twin Cam

Only 4 left!

James Gaskets Top End Gasket Kit. Twin Cam. PTFE – 1999–2004 88" 1450cc Twin Cam 3-3/4" bore with .046" PTFE coated head gaskets; RCM (Rubber Coate...

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£118.35 - £118.35
£118.35
£121.03
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£121.03
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£123.98
£126.79
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£126.79

James Gaskets Motor Gasket Kit. 3-7/8" Bore – 1999–2016 Twin Cam with 3-7/8" Bore.…

Only 3 left!

James Gaskets Motor Gasket Kit. 3-7/8" Bore – 1999–2016 Twin Cam with 3-7/8" Bore.… Fits 88" to 95" (1550cc) or 96" to 103" (1690cc) 3-7/8" big bor...

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£123.98 - £123.98
£123.98
£126.79
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£126.79
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£17.56
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£17.56
£17.31
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£17.31

James Gaskets Induction Module Gasket & Seal Kit – 1999–2001 FLT Twin Cam with…

Only 2 left!

James Gaskets Induction Module Gasket & Seal Kit – 1999–2001 FLT Twin Cam with… Gasket & seal kit for the Gen2 Magneti-Marelli fuel injecti...

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£17.56
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£17.56
£17.31
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£17.31
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£78.87 - £78.87
£78.87
£79.48
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£79.48

James Gaskets Rocker Cover Gasket Kit. Twin Cam. RCM – 1999–2017 Twin Cam

Only 5 left!

James Gaskets Rocker Cover Gasket Kit. Twin Cam. RCM – 1999–2017 Twin Cam Includes RCM (Rubber Coated Metal) rocker base and rocker cover gaskets; ...

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£78.87 - £78.87
£78.87
£79.48
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£79.48
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£25.26
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£25.26
£24.90
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£24.90

James Gaskets Induction Module Gasket & Seal Kit – 1995–1998 FLT/Touring Fuel Injected…

Only 3 left!

James Gaskets Induction Module Gasket & Seal Kit – 1995–1998 FLT/Touring Fuel Injected… Gasket & seal kit for the Gen1 Magneti-Marelli fuel...

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£25.26
£25.26 - £25.26
£25.26
£24.90
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£24.90
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£75.76 - £75.76
£75.76
£76.34
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£76.34

James Gaskets Cylinder Head & Base Gasket Kit. .045" Firering – 1999–2017 88"/96" Twin Cam

Only 3 left!

James Gaskets Cylinder Head & Base Gasket Kit. .045" Firering – 1999–2017 88"/96" Twin Cam Standard 3-3/4" bore. .045" double sided silicone Fi...

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£75.76 - £75.76
£75.76
£76.34
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£76.34
£131.38 - £131.38
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£134.35
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£134.35

James Gaskets Motor Gasket Kit. 3-3/4" Bore Fire-ring – 1999–2004 88" Twin Cam

Only 2 left!

James Gaskets Motor Gasket Kit. 3-3/4" Bore Fire-ring – 1999–2004 88" Twin Cam 0.045" thick 3-3/4" bore head gaskets with Fire-ring®; silicone bead...

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£131.38 - £131.38
£131.38
£134.35
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£134.35
£118.35 - £118.35
£118.35
£121.03
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£121.03

James Gaskets Top End Gasket Kit. Twin Cam. Firering – 1999–2004 88" 1450cc Twin Cam

Only 2 left!

James Gaskets Top End Gasket Kit. Twin Cam. Firering – 1999–2004 88" 1450cc Twin Cam 3-3/4" bore with 0.045" Firering head gaskets; RCM (Rubber Coa...

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£118.35 - £118.35
£118.35
£121.03
£121.03 - £121.03
£121.03
£121.89 - £121.89
£121.89
£124.65
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£124.65

James Gaskets Top End Gasket Kit. Evo B.T. 3-5/8" Big Bore – 1992–1999 Evo Big Twin with 3-5/8" Big…

Only 4 left!

James Gaskets Top End Gasket Kit. Evo B.T. 3-5/8" Big Bore – 1992–1999 Evo Big Twin with 3-5/8" Big… .045" head gaskets with Firering®; RCM (Rubber...

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£121.89 - £121.89
£121.89
£124.65
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£124.65
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£101.57
£103.87
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£103.87

James Gaskets Top End Gasket Kit. Evo B.T. 3-5/8" Big Bore – 1984–1991 Big Twin with 3-5/8" Big Bore…

Only 3 left!

James Gaskets Top End Gasket Kit. Evo B.T. 3-5/8" Big Bore – 1984–1991 Big Twin with 3-5/8" Big Bore… .045" head gaskets with Firering®; RCM (Rubbe...

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£101.57 - £101.57
£101.57
£103.87
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£103.87
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£113.01
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£113.01
£111.43
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£111.43

Jims Rocker Arm Shaft for Shovel – 1966–1984 Shovelhead

in stock

Jims Rocker Arm Shaft for Shovel – 1966–1984 Shovelhead OEM style replacement. Manufactured from precision machined tool steel. Dimensions: Standar...

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£113.01
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£113.01
£111.43
£111.43 - £111.43
£111.43
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£107.72
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£107.72
£106.21
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£106.21

Jims Rocker Arm Shaft, Early Sportster – 1957–1985 XL Sportster

Only 3 left!

Jims Rocker Arm Shaft, Early Sportster – 1957–1985 XL Sportster OEM style replacement. Manufactured from precision machined hardened tool steel. Di...

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£107.72
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£107.72
£106.21
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£106.21
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£44.03
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£44.03
£43.41
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£43.41

Jims Rocker Arm Shaft 84-Up – 1984–1999 Evo Big Twin; 1999–2017 Twin…

Only 3 left!

Jims Rocker Arm Shaft 84-Up – 1984–1999 Evo Big Twin; 1999–2017 Twin… OEM style replacement. Manufactured from precision machined hardened tool ste...

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£44.03
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£44.03
£43.41
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£43.41
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£66.67
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£66.67
£64.36
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£64.36

Andrews High Performance Spring Set .560" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin…

Only 1 left!

Andrews High Performance Spring Set .560" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin… Red painted. High performance .560" lift spring set for hi...

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£66.67
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£66.67
£64.36
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£64.36
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£93.30
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£93.30
£79.72
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£79.72

MCS Complete 91-03 XL Multiple-parts Pushrod Cover Kit. Chrome – 1991–2003 XL Sportster

Only 1 left!

MCS Complete 91-03 XL Multiple-parts Pushrod Cover Kit. Chrome – 1991–2003 XL Sportster This ''early style'' multiple-parts pushrods conversion kit...

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£93.30
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£93.30
£79.72
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£79.72
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£112.50
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£112.50
£110.13
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£110.13

Andrews 57-85 XL Non-adj. Aluminum Pushrod Set – 1957–1985 XL Sportster

Only 2 left!

Andrews 57-85 XL Non-adj. Aluminum Pushrod Set – 1957–1985 XL Sportster Pushrods are fixed length and must be used with the OEM solid type; adjusta...

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£112.50
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£112.50
£110.13
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Sold out
£133.63
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£133.63
£130.83
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£130.83

Andrews 91-03 XL Non-adj. Aluminum Pushrod Set – 1991–2003 XL Sportster

Out of stock

Andrews 91-03 XL Non-adj. Aluminum Pushrod Set – 1991–2003 XL Sportster Non adjustable fixed length pushrods; for use with OEM style hydraulic tapp...

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£133.63
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£133.63
£130.83
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£130.83
Sold out
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£237.94
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£237.94
£236.30
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£236.30

Andrews 86-90 XL Adj. Chromoly Pushrod Set – 1986–1990 XL Sportster

Only 2 left!

Andrews 86-90 XL Adj. Chromoly Pushrod Set – 1986–1990 XL Sportster Can be used with OEM hydraulic tappets or run as solids. Chromoly pushrods are ...

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£237.94
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£237.94
£236.30
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£236.30
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£499.01 - £499.01
£499.01
£502.82
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£502.82

Andrews N6 / .490" Evo Sportster Cam Set – 1991–1999 XL Sportster

Only 2 left!

Andrews N6 / .490" Evo Sportster Cam Set – 1991–1999 XL Sportster .490" valve lift. Modified engines 1200 to 80"; strokers; and/or high CR pistons....

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£502.82
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£906.74
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£906.74

Paughco Independent Dual Head Pipes. Chrome – 1995–2006 FLT/Touring Models

Out of stock

Paughco Independent Dual Head Pipes. Chrome – 1995–2006 FLT/Touring Models Stock 1-3/4" diameter crossover headpipes that are not connected to each...

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£853.85 - £853.85
£853.85
£906.74
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£906.74
Sold out
Sold out
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£929.32
£986.88
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£986.88

Paughco Upswept Fishtail Exhaust. Chrome – 1986–1999 Softail

Out of stock

Paughco Upswept Fishtail Exhaust. Chrome – 1986–1999 Softail These pipes come un-baffled and in a 1 3/4" diameter. Unbeatable classic chopper desig...

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£929.32 - £929.32
£929.32
£986.88
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£986.88
Sold out
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£793.47
£842.61
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£842.61

Paughco Independent Dual Head Pipes. Chrome – 1970–1984 FL Shovel

Only 2 left!

Paughco Independent Dual Head Pipes. Chrome – 1970–1984 FL Shovel Stock 1-3/4" diameter crossover headpipes that are not connected to each other. R...

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£793.47 - £793.47
£793.47
£842.61
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