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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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£152.82 - £152.82
£152.82
£156.28
£156.28 - £156.28
£156.28

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

Only 3 left!

James Gaskets Top End Gasket Kit. Twin Cam. MLS – 1999–2004 88" 1450cc Twin Cam 3-3/4" bore with .045" 3-3/4" MLS (Multi Layer Steel) head gaskets ...

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£152.82 - £152.82
£152.82
£156.28
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£156.28
£118.35 - £118.35
£118.35
£121.03
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£121.03

James Gaskets Top End Gasket Kit. Twin Cam 3-7/8" Bore – 2005–2017 95/103" Twin Cam

Only 3 left!

James Gaskets Top End Gasket Kit. Twin Cam 3-7/8" Bore – 2005–2017 95/103" Twin Cam .045" Firering® head gaskets; RCM (Rubber Coated Metal) rocker ...

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£118.35 - £118.35
£118.35
£121.03
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£121.03
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James Gaskets Top End Gasket Kit. Twin Cam 3-3/4" Bore – 2005–2017 88"/96" Twin Cam A/B

Only 4 left!

James Gaskets Top End Gasket Kit. Twin Cam 3-3/4" Bore – 2005–2017 88"/96" Twin Cam A/B 0.045" PTFE coated head gaskets; RCM (Rubber Coated Metal) ...

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£118.35 - £118.35
£118.35
£121.03
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£121.03
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£15.71
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£15.71
£15.49
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£15.49

James Gaskets Exhaust Gasket Set. 84-90/10-Up Style (PR) – 1984–2026 Big Twin; 1986–2022 XL…

Only 4 left!

James Gaskets Exhaust Gasket Set. 84-90/10-Up Style (PR) – 1984–2026 Big Twin; 1986–2022 XL… 84-90/10-up OEM style. 2-pack display. Steel flat wire...

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£15.71
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£15.71
£15.49
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£15.49
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£136.89 - £136.89
£136.89
£139.99
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£139.99

James Gaskets Top End Gasket Kit. Evo B.T. 4" Big Bore – 1992–1999 Evo Big Twin with 4" Big Bore…

Only 2 left!

James Gaskets Top End Gasket Kit. Evo B.T. 4" Big Bore – 1992–1999 Evo Big Twin with 4" Big Bore… .045" head gaskets with Firering®; RCM (Rubber Co...

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£136.89 - £136.89
£136.89
£139.99
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£139.99
£155.68 - £155.68
£155.68
£159.20
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£159.20

James Gaskets Motor Gasket Kit. 84-91 B.T – 1984–1991 Evo Big Twin 4 & 5-Speed

Only 3 left!

James Gaskets Motor Gasket Kit. 84-91 B.T – 1984–1991 Evo Big Twin 4 & 5-Speed 0.040" MLS (Multi Layer Steel) head gaskets; RCM (Rubber Coated ...

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£155.68 - £155.68
£155.68
£159.20
£159.20 - £159.20
£159.20
£72.69 - £72.69
£72.69
£73.25
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£73.25

James Gaskets Primary Gasket Kit. Outer Cover – 2007–2016 FLT/Touring; 2009–2016 Trike

Only 4 left!

James Gaskets Primary Gasket Kit. Outer Cover – 2007–2016 FLT/Touring; 2009–2016 Trike Includes .031" silicone beaded paper primary and derby cover...

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£72.69 - £72.69
£72.69
£73.25
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£73.25
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£20.69
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£20.69
£20.40
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£20.40

James Gaskets Oil Pump Gasket & Seal Kit. XL Sportster. RCM – 1991–2022 XL Sportster

Only 1 left!

James Gaskets Oil Pump Gasket & Seal Kit. XL Sportster. RCM – 1991–2022 XL Sportster With RCM (Rubber Coated Metal) gasket. Incl. snap ring and...

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£20.69
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£20.40
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£20.40
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£23.83
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£23.83
£23.50
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£23.50

James Gaskets Exhaust Gasket & Mount Kit. 91-09 Style – 1984–2026 Big Twin; 1986–2022 XL…

Only 3 left!

James Gaskets Exhaust Gasket & Mount Kit. 91-09 Style – 1984–2026 Big Twin; 1986–2022 XL… Incl. 91-09 style wire/graphite gaskets; 2 retaining ...

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£23.83
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£23.83
£23.50
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£23.50
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£23.83
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£23.83
£23.50
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£23.50

James Gaskets Exhaust Gasket & Mount Kit. Wire/Graphite Gaskets – 1984–2026 Big Twin; 1986–2022 XL…

Only 4 left!

James Gaskets Exhaust Gasket & Mount Kit. Wire/Graphite Gaskets – 1984–2026 Big Twin; 1986–2022 XL… Incl. 84-90/10-up style wire/graphite gaske...

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£23.83
£23.83 - £23.83
£23.83
£23.50
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£23.50
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£23.81
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£23.81
£23.48
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£23.48

James Gaskets Exhaust Gasket & Mount Kit. Copper Gaskets – 1984–2026 Big Twin; 1986–2022 XL…

Only 4 left!

James Gaskets Exhaust Gasket & Mount Kit. Copper Gaskets – 1984–2026 Big Twin; 1986–2022 XL… Incl. round copper crush ring style gaskets; 2 ret...

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£23.81
£23.81 - £23.81
£23.81
£23.48
£23.48 - £23.48
£23.48
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£72.69 - £72.69
£72.69
£73.25
£73.25 - £73.25
£73.25

James Gaskets Pimary Cover Gasket & Seal Kit. Outer. Paper – 2007–2017 Softail; 2006–2017 Dyna

Only 3 left!

James Gaskets Pimary Cover Gasket & Seal Kit. Outer. Paper – 2007–2017 Softail; 2006–2017 Dyna .031" fiber reinforced paper with a silicone bea...

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£72.69 - £72.69
£72.69
£73.25
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£73.25
£126.28 - £126.28
£126.28
£129.13
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£129.13

James Gaskets Gasket Primary Cover. .030" Paper/Silicone – 2007–2017 Softail; 2006–2017 Dyna

Only 1 left!

James Gaskets Gasket Primary Cover. .030" Paper/Silicone – 2007–2017 Softail; 2006–2017 Dyna .031" thick fiber reinforced paper with a silicone bea...

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£126.28 - £126.28
£126.28
£129.13
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£129.13
£72.51 - £72.51
£72.51
£73.07
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£73.07

James Gaskets Primary Cover Gasket & Seal Kit. Inner/Outer – 70-E80 Big Twin

Only 4 left!

James Gaskets Primary Cover Gasket & Seal Kit. Inner/Outer – 70-E80 Big Twin With With silicone beaded 0.062" paper primary coverMolded rubber ...

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£72.51 - £72.51
£72.51
£73.07
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£73.07
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£72.51
£73.07
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£73.07

James Gaskets Primary Cover Gasket & Seal Kit. Inner/Outer – 1965–1969 Big Twin

Only 3 left!

James Gaskets Primary Cover Gasket & Seal Kit. Inner/Outer – 1965–1969 Big Twin With silicone beaded 0.062" paper primary cover gasket. Molded ...

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£72.51 - £72.51
£72.51
£73.07
£73.07 - £73.07
£73.07
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£9.43
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£9.43
£8.97
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£8.97

James Gaskets James End Plate, Countershaft. Black – 1936–1964 Big Twin

Only 3 left!

James Gaskets James End Plate, Countershaft. Black – 1936–1964 Big Twin OEM replacement reference 36027-36 Fitment 36-64 Big Twin (NU) Product Deta...

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£9.43
£9.43 - £9.43
£9.43
£8.97
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£8.97
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£37.55 - £37.55
£37.55
£37.84
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£37.84

James Gaskets Primary Cover Gasket Kit. Silicone – 2004–2022 XL Sportster; 2008–2012 XR1200

Only 2 left!

James Gaskets Primary Cover Gasket Kit. Silicone – 2004–2022 XL Sportster; 2008–2012 XR1200 Complete primary cover gasket kit for Sportster models....

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£37.55 - £37.55
£37.55
£37.84
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£37.84
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£9.72
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£9.72
£9.25
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£9.25

James Gaskets Gasket Inspection Cover. RCM – 1980–1984 FLT/Touring; 1982–1984 FXR

Only 3 left!

James Gaskets Gasket Inspection Cover. RCM – 1980–1984 FLT/Touring; 1982–1984 FXR James RCM (Rubber Coated Metal). OEM replacement reference 34906-...

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£9.72
£9.72 - £9.72
£9.72
£9.25
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£9.25
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£114.67 - £114.67
£114.67
£117.26
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£117.26

James Gaskets Transmission Gasket & Seal Kit – 2007–2016 FLT/Touring

Only 3 left!

James Gaskets Transmission Gasket & Seal Kit – 2007–2016 FLT/Touring For stock 6-speed transmissions (Cruise Drive). Includes all required seal...

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£114.67 - £114.67
£114.67
£117.26
£117.26 - £117.26
£117.26
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£114.67
£117.26
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£117.26

James Gaskets Transmission Gasket & Seal Kit – 2006–2017 Dyna; 2007–2017 Softail

Only 1 left!

James Gaskets Transmission Gasket & Seal Kit – 2006–2017 Dyna; 2007–2017 Softail For stock 6-speed transmissions (Cruise Drive). Includes all r...

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£114.67 - £114.67
£114.67
£117.26
£117.26 - £117.26
£117.26
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£3.31
£3.31 - £3.31
£3.31
£3.15
£3.15 - £3.15
£3.15

James Gaskets O-ring Starter Motor Housing – 1991–2017 Big Twin; 1991–1994 XL…

Only 2 left!

James Gaskets O-ring Starter Motor Housing – 1991–2017 Big Twin; 1991–1994 XL… 2 o-rings used. Fitment 91-17 Big Twin (Excl. 2017 FLT/Touring); 91-...

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£3.31
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£3.31
£3.15
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£3.15
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£21.35
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£21.35
£21.05
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£21.05

James Gaskets Gasket Carb/Throttle Body to Air Cleaner Housing – 2001–2015 Softail; 2004–2017 Dyna…

Only 3 left!

James Gaskets Gasket Carb/Throttle Body to Air Cleaner Housing – 2001–2015 Softail; 2004–2017 Dyna… .055" thick paper. Early 01-05 design; but will...

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£21.35
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£21.35
£21.05
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£35.64
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£35.64
£35.15
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£35.15

James Gaskets Manifold Gasket & Spacer Kit – 1999–2006 Big Twin with Screamin'' Eagle…

Only 2 left!

James Gaskets Manifold Gasket & Spacer Kit – 1999–2006 Big Twin with Screamin'' Eagle… Used with Screamin'' Eagle high performance intake manif...

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£35.64
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£35.64
£35.15
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£35.15
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£22.34
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£22.34
£22.03
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£22.03

James Gaskets Manifold Gasket & Spacer Kit. 4-Bolt Linkert – 1940–1965 OHV Big Twin; 1952–1956 K/KH

Only 2 left!

James Gaskets Manifold Gasket & Spacer Kit. 4-Bolt Linkert – 1940–1965 OHV Big Twin; 1952–1956 K/KH Fits all 40-47 Knuckle; 48-65 Panhead and 5...

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£22.34
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£22.34
£22.03
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£22.03
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