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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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£17.32
£17.32 - £17.32
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£17.08

Feuling Machined Valve Seat Spring Shim Kit – 1984–1999 Evo Big Twin; 1999–2004 Twin…

Out of stock

Feuling Machined Valve Seat Spring Shim Kit – 1984–1999 Evo Big Twin; 1999–2004 Twin… .060" & .015" thick. 1.500" OD & .645" ID. Includes 4...

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£34.66
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£34.18
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£34.18

Feuling Valve Key Set. STD. 7mm – 2005–2017 Twin Cam; 2004–2022 XL…

Only 2 left!

Feuling Valve Key Set. STD. 7mm – 2005–2017 Twin Cam; 2004–2022 XL… Machined hardened steel. OEM style valve keepers replacement for stock 7mm valv...

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£45.50
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£44.87
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Feuling Valve Keys. Standard. 5/16" – 1984–2004 Evo Big Twin; 1999–2004 Twin…

Out of stock

Feuling Valve Keys. Standard. 5/16" – 1984–2004 Evo Big Twin; 1999–2004 Twin… Machined hardened steel. Fits as stock replacement. Comes with standa...

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£45.50
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£45.50
£44.87
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£44.87
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£34.66
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£34.66
£34.18
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£34.18

Feuling Valve Keys 10 Degree Angle. +.050" Height – Specialty Applications Only with…

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Feuling Valve Keys 10 Degree Angle. +.050" Height – Specialty Applications Only with… Specialty 10 degrees angled valve keepers. +.050" (1.27mm) in...

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£34.66
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£34.66
£34.18
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£34.18
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£394.34 - £394.34
£394.34
£397.37
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£397.37

Feuling High Load Beehive Valve Spring Kit. .750" Lift – 1999–2017 Twin Cam with Screamin'' Eagle…

Out of stock

Feuling High Load Beehive Valve Spring Kit. .750" Lift – 1999–2017 Twin Cam with Screamin'' Eagle… For Screamin'' Eagle heads. Installed pressure 2...

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£394.34 - £394.34
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£397.37
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£397.37
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£397.37
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£397.37

Feuling High Load Beehive Valve Spring Kit. .750" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin…

Only 2 left!

Feuling High Load Beehive Valve Spring Kit. .750" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin… Installed pressure 217lbs@1.789"; open pressure &a...

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£394.34 - £394.34
£394.34
£397.37
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£397.37
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Feuling Endurance Beehive Valve Spring Kit. .650" Lift – 1999–2017 Twin Cam A/B with Screamin''…

Out of stock

Feuling Endurance Beehive Valve Spring Kit. .650" Lift – 1999–2017 Twin Cam A/B with Screamin''… Installed pressure 198lbs@1.685"; open pressure &a...

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£394.34 - £394.34
£394.34
£397.37
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£397.37
Sold out
£394.34 - £394.34
£394.34
£397.37
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£397.37

Feuling Endurance Beehive Valve Spring Kit. .650" Lift – 2005–2017 Twin Cam A/B; 2004–2022 XL…

Only 2 left!

Feuling Endurance Beehive Valve Spring Kit. .650" Lift – 2005–2017 Twin Cam A/B; 2004–2022 XL… Installed pressure 198lbs@1.685"; open pressure &...

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£394.34 - £394.34
£394.34
£397.37
£397.37 - £397.37
£397.37
£394.34 - £394.34
£394.34
£397.37
£397.37 - £397.37
£397.37

Feuling Endurance Beehive Valve Spring Kit. .650" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin…

Only 2 left!

Feuling Endurance Beehive Valve Spring Kit. .650" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin… Direct replacement; installs without machining or ...

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£394.34 - £394.34
£394.34
£397.37
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£397.37
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£247.36
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£247.36
£245.68
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£245.68

Feuling Econo Beehive Valve Spring Kit. .585" Lift – 2005–2017 Twin Cam; 2004–2022 XL…

Only 2 left!

Feuling Econo Beehive Valve Spring Kit. .585" Lift – 2005–2017 Twin Cam; 2004–2022 XL… Steel top collars. Installed pressure 183lbs@1.760"; open pr...

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£247.36
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£247.36
£245.68
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£245.68
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£247.36
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£247.36
£245.68
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£245.68

Feuling Econo Beehive Valve Spring Kit. .585" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin…

Only 2 left!

Feuling Econo Beehive Valve Spring Kit. .585" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin… Steel top collars. Installed pressure 183lbs@1.760"; o...

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£247.36
£247.36 - £247.36
£247.36
£245.68
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£245.68
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£44.75
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£42.60
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£42.60

Cometic Gasket Rocker Cover – 1936–1947 Knucklehead

Only 2 left!

Cometic Gasket Rocker Cover – 1936–1947 Knucklehead Front intake; rear exhaust. OEM replacement reference 17535-38; 175-38 Fitment 36-47 Knucklehea...

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£44.75
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£44.75
£42.60
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£136.28
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£136.28
£134.38
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£134.38

Cometic EST Motor Only Gasket Kit. 3-3/4" Bore – 1999–2006 88" Twin Cam

Only 2 left!

Cometic EST Motor Only Gasket Kit. 3-3/4" Bore – 1999–2006 88" Twin Cam With .040" MLS (Multi Layer Steel) head gaskets. 99-04 style early valve st...

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£136.28
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£136.28
£134.38
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£134.38
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£27.71
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£27.71
£26.38
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£26.38

Cometic Cylinder Base Gaskets. MLS 3-5/8" Big Bore (Pr) – 1963–1965 Panhead; 1966–1984 Shovelhead.…

Out of stock

Cometic Cylinder Base Gaskets. MLS 3-5/8" Big Bore (Pr) – 1963–1965 Panhead; 1966–1984 Shovelhead.… Front & rear gasket for one engine. .020" M...

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£27.71
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£27.71
£26.38
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£26.38
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£27.71
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£26.38
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Cometic Cylinder Base Gasket Set FR/RR. .020" RCS – 1963–1965 Panhead; 1966–1984 Shovelhead

Out of stock

Cometic Cylinder Base Gasket Set FR/RR. .020" RCS – 1963–1965 Panhead; 1966–1984 Shovelhead Front & rear set. With two oil holes. .020" thick R...

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£27.71
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£27.71
£26.38
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£26.38
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£120.82
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£120.82
£119.14
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£119.14

Cometic EST Top End Gasket Kit. Twin Cam 4-1/8" Bore – 1999–2017 Twin Cam with 4-1/8" Bore

Only 2 left!

Cometic EST Top End Gasket Kit. Twin Cam 4-1/8" Bore – 1999–2017 Twin Cam with 4-1/8" Bore With MLS (Multi-Layer-Steel) .040" thick head gaskets. S...

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£120.82
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£120.82
£119.14
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£119.14
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£115.11
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£115.11
£113.51
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£113.51

Cometic EST Top End Gasket Kit. XL1200 – 2004–2006 XL1200

Out of stock

Cometic EST Top End Gasket Kit. XL1200 – 2004–2006 XL1200 With 3.50" bore MLS (Multi-Layer-Steel) .030" thick head gaskets. SLS (Single-Layer-Steel...

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£115.11
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£115.11
£113.51
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£113.51
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£222.10
£223.81
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£223.81

Cometic EST Motor Gasket Kit – 2007–2022 XL1200

Only 2 left!

Cometic EST Motor Gasket Kit – 2007–2022 XL1200 This EST (Extreme-Sealing-Technology) gasket set is complete with all gaskets; seals and o-rings th...

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£222.10 - £222.10
£222.10
£223.81
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£223.81
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£222.10
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£223.81

Cometic EST Motor Gasket Kit – 2007–2022 XL883

Only 2 left!

Cometic EST Motor Gasket Kit – 2007–2022 XL883 This EST (Extreme-Sealing-Technology) gasket set is complete with all gaskets; seals and o-rings tha...

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£222.10 - £222.10
£222.10
£223.81
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£223.81
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£222.10
£223.81
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£223.81

Cometic EST Motor Gasket Kit – 2004–2006 XL883

Only 2 left!

Cometic EST Motor Gasket Kit – 2004–2006 XL883 This EST (Extreme-Sealing-Technology) gasket set is complete with all gaskets; seals and o-rings tha...

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£222.10 - £222.10
£222.10
£223.81
£223.81 - £223.81
£223.81
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£161.18
£161.18 - £161.18
£161.18
£158.94
£158.94 - £158.94
£158.94

Cometic EST Motor Gasket Kit – 2004–2006 XL1200

Only 2 left!

Cometic EST Motor Gasket Kit – 2004–2006 XL1200 This EST (Extreme-Sealing-Technology) gasket set is complete with all gaskets; seals and o-rings th...

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£161.18
£161.18 - £161.18
£161.18
£158.94
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£158.94
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£221.09 - £221.09
£221.09
£222.79
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£222.79

Cometic EST Motor Gasket Kit. 3-7/8" Bore – 2006–2017 103" Dyna

Only 2 left!

Cometic EST Motor Gasket Kit. 3-7/8" Bore – 2006–2017 103" Dyna This EST (Extreme-Sealing-Technology) gasket set is complete with all gaskets; seal...

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£221.09 - £221.09
£221.09
£222.79
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£222.79
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£221.09
£222.79
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£222.79

Cometic EST Motor Gasket Kit. 3-7/8" Bore – 2007–2017 103" FLT/Touring

Only 1 left!

Cometic EST Motor Gasket Kit. 3-7/8" Bore – 2007–2017 103" FLT/Touring This EST (Extreme-Sealing-Technology) gasket set is complete with all gasket...

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£221.09 - £221.09
£221.09
£222.79
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£222.79
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£222.79
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£222.79

Cometic EST Motor Gasket Kit. 3-7/8" Bore – 2007–2017 103" Softail

Out of stock

Cometic EST Motor Gasket Kit. 3-7/8" Bore – 2007–2017 103" Softail This EST (Extreme-Sealing-Technology) gasket set is complete with all gaskets; s...

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£221.09 - £221.09
£221.09
£222.79
£222.79 - £222.79
£222.79
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