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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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£168.08
£168.08 - £168.08
£168.08
£165.75
£165.75 - £165.75
£165.75

Cometic EST Motor Gasket Kit. 3-3/4" Bore – 2006–2017 96" Dyna (with 1999–2010 Style…

Out of stock

Cometic EST Motor Gasket Kit. 3-3/4" Bore – 2006–2017 96" Dyna (with 1999–2010 Style… This EST (Extreme-Sealing-Technology) gasket set is complete ...

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£165.75
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£165.75
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£120.82
£120.82 - £120.82
£120.82
£119.14
£119.14 - £119.14
£119.14

Cometic EST Top End Gasket Kit. Twin Cam 3-3/4" Bore – 1999–2017 88/96" Twin Cam

Only 2 left!

Cometic EST Top End Gasket Kit. Twin Cam 3-3/4" Bore – 1999–2017 88/96" Twin Cam With MLS (Multi-Layer-Steel) .040" thick head gaskets. The SLS (Si...

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£120.82
£120.82 - £120.82
£120.82
£119.14
£119.14 - £119.14
£119.14
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£120.82
£120.82 - £120.82
£120.82
£119.14
£119.14 - £119.14
£119.14

Cometic EST Top End Gasket Kit. Twin Cam 3-3/4" Bore – 1999–2017 88/96" Twin Cam

Only 2 left!

Cometic EST Top End Gasket Kit. Twin Cam 3-3/4" Bore – 1999–2017 88/96" Twin Cam With MLS (Multi-Layer-Steel) .030" thick head gaskets. The SLS (Si...

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£120.82
£120.82 - £120.82
£120.82
£119.14
£119.14 - £119.14
£119.14
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£136.28
£136.28 - £136.28
£136.28
£134.38
£134.38 - £134.38
£134.38

Cometic EST Motor Only Gasket Kit. 4" Bore – 1999–2017 Twin Cam (for 1999–2004 Early…

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Cometic EST Motor Only Gasket Kit. 4" Bore – 1999–2017 Twin Cam (for 1999–2004 Early… With .040" MLS (Multi Layer Steel) head gaskets. With 99-10 s...

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£136.28
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£136.28
£134.38
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£134.38
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£136.28
£136.28 - £136.28
£136.28
£134.38
£134.38 - £134.38
£134.38

Cometic EST Motor Only Gasket Kit. 4" Bore – 1999–2017 Twin Cam (for 1999–2004 Early…

Only 2 left!

Cometic EST Motor Only Gasket Kit. 4" Bore – 1999–2017 Twin Cam (for 1999–2004 Early… With .030" MLS (Multi Layer Steel) head gaskets. With 99-10 s...

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£136.28
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£136.28
£134.38
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£134.38
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£51.20
£51.20 - £51.20
£51.20
£48.75
£48.75 - £48.75
£48.75

Cometic Cylinder Head Gaskets 3-7/8" Bore .045" MLS – 1999–2017 Twin Cam. With 3-7/8" Bore…

Out of stock

Cometic Cylinder Head Gaskets 3-7/8" Bore .045" MLS – 1999–2017 Twin Cam. With 3-7/8" Bore… MLS (Multi Layer Steel). Front & rear gasket for on...

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£51.20
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£51.20
£48.75
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£48.75
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£51.20
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£51.20
£48.75
£48.75 - £48.75
£48.75

Cometic Cylinder Head Gaskets 3-7/8" Bore .051" MLS – 1999–2017 Twin Cam. With 3-7/8" Bore…

Only 2 left!

Cometic Cylinder Head Gaskets 3-7/8" Bore .051" MLS – 1999–2017 Twin Cam. With 3-7/8" Bore… MLS (Multi Layer Steel). Front & rear gasket for on...

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£51.20
£48.75
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£48.75
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£34.57
£34.57 - £34.57
£34.57
£32.91
£32.91 - £32.91
£32.91

Cometic Primary Gasket & Seal Kit. AFM – 2004–2005 XL Sportster; 2008–2012 XR1200

Only 1 left!

Cometic Primary Gasket & Seal Kit. AFM – 2004–2005 XL Sportster; 2008–2012 XR1200 These AFM (Aluminum Foamette Material) gaskets feature an alu...

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£34.57
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£34.57
£32.91
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£32.91
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£12.66
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£12.66
£12.05
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£12.05

Cometic Exhaust Gaskets V-Rod – 2002–2008 V-Rod

Out of stock

Cometic Exhaust Gaskets V-Rod – 2002–2008 V-Rod Used between exhaust and cylinder head. OEM replacement reference 65109-01. Fitment 02-08 V-Rod (NU...

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£12.66
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£12.66
£12.05
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£12.05
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£27.71
£27.71 - £27.71
£27.71
£26.38
£26.38 - £26.38
£26.38

Cometic Cylinder Base Gasket Set. SLS 4-1/8" Big Bore – 1999–2017 Twin Cam with 4-1/8" Bore…

Out of stock

Cometic Cylinder Base Gasket Set. SLS 4-1/8" Big Bore – 1999–2017 Twin Cam with 4-1/8" Bore… Front & rear gasket for one engine. .020" thick SL...

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£27.71
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£27.71
£26.38
£26.38 - £26.38
£26.38
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Sold out
£27.71
£27.71 - £27.71
£27.71
£26.38
£26.38 - £26.38
£26.38

Cometic Cylinder Base Gasket Set. SLS 4-1/8" Big Bore – 1999–2017 Twin Cam with 4-1/8" Bore…

Out of stock

Cometic Cylinder Base Gasket Set. SLS 4-1/8" Big Bore – 1999–2017 Twin Cam with 4-1/8" Bore… Front & rear gasket for one engine. .010" thick SL...

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£27.71
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£27.71
£26.38
£26.38 - £26.38
£26.38
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Sold out
£27.71
£27.71 - £27.71
£27.71
£26.38
£26.38 - £26.38
£26.38

Cometic Cylinder Base Gasket Set. SLS 4" Bore – 1999–2017 Twin Cam 110" & Others with 4"…

Out of stock

Cometic Cylinder Base Gasket Set. SLS 4" Bore – 1999–2017 Twin Cam 110" & Others with 4"… Front & rear gasket for one engine. .020" thick S...

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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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£27.71
£26.38
£26.38 - £26.38
£26.38

Cometic Cylinder Base Gasket Set. SLS 4" Bore – 1999–2017 Twin Cam. 110" & Others with…

Only 2 left!

Cometic Cylinder Base Gasket Set. SLS 4" Bore – 1999–2017 Twin Cam. 110" & Others with… Front & rear gasket for one engine. .010" thick SLS...

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£27.71
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£27.71
£26.38
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£26.38
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£51.20
£51.20 - £51.20
£51.20
£48.75
£48.75 - £48.75
£48.75

Cometic Cylinder Head Gasket Set. 4-1/8" .045" MLS – S&S 4-1/8" Bore SSW+ Engines

Only 2 left!

Cometic Cylinder Head Gasket Set. 4-1/8" .045" MLS – S&S 4-1/8" Bore SSW+ Engines .045" thick MLS (Multi Layer Steel). Consists of a top and bo...

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£51.20
£51.20 - £51.20
£51.20
£48.75
£48.75 - £48.75
£48.75
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£51.20
£51.20 - £51.20
£51.20
£48.75
£48.75 - £48.75
£48.75

Cometic Cylinder Head Gasket Set. 4-1/8" .040" MLS – S&S 4-1/8" Bore SSW+ Engines

Only 1 left!

Cometic Cylinder Head Gasket Set. 4-1/8" .040" MLS – S&S 4-1/8" Bore SSW+ Engines .040" thick MLS (Multi Layer Steel). Consists of a top and bo...

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£51.20
£51.20 - £51.20
£51.20
£48.75
£48.75 - £48.75
£48.75
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Save 5% Save %
£51.20
£51.20 - £51.20
£51.20
£48.75
£48.75 - £48.75
£48.75

Cometic Cylinder Head Gasket Set. 4-1/8" .036" MLS – S&S 4-1/8" Bore SSW+ Engines

Only 2 left!

Cometic Cylinder Head Gasket Set. 4-1/8" .036" MLS – S&S 4-1/8" Bore SSW+ Engines .036" thick MLS (Multi Layer Steel). Consists of a top and bo...

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£51.20
£51.20 - £51.20
£51.20
£48.75
£48.75 - £48.75
£48.75
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£51.20
£51.20 - £51.20
£51.20
£48.75
£48.75 - £48.75
£48.75

Cometic Cylinder Head Gasket Set. 4-1/8" .030" MLS – S&S 4-1/8" Bore SSW+ Engines

Only 2 left!

Cometic Cylinder Head Gasket Set. 4-1/8" .030" MLS – S&S 4-1/8" Bore SSW+ Engines .030" thick MLS (Multi Layer Steel). Consists of a top and bo...

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£51.20
£51.20 - £51.20
£51.20
£48.75
£48.75 - £48.75
£48.75
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£51.20
£51.20 - £51.20
£51.20
£48.75
£48.75 - £48.75
£48.75

Cometic Cylinder Head Gasket Set. 4-1/8" .027" MLS – S&S 4-1/8" SSW+ Engines

Only 2 left!

Cometic Cylinder Head Gasket Set. 4-1/8" .027" MLS – S&S 4-1/8" SSW+ Engines .027" thick MLS (Multi Layer Steel). Consists of a top and bottom ...

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£51.20
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£51.20
£48.75
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£48.75
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£103.22
£103.22 - £103.22
£103.22
£101.79
£101.79 - £101.79
£101.79

Cometic Cylinder Head Gasket Set. 4-1/4" .030" MLS – 2002–2007 V-Rod with 4-1/8" Big Bore…

Only 2 left!

Cometic Cylinder Head Gasket Set. 4-1/4" .030" MLS – 2002–2007 V-Rod with 4-1/8" Big Bore… .030" MLS (Multi Layer Steel). MLS consists of a top and...

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£103.22
£103.22 - £103.22
£103.22
£101.79
£101.79 - £101.79
£101.79
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£103.22
£103.22 - £103.22
£103.22
£101.79
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£101.79

Cometic Cylinder Head Gasket Set. 4-1/4" .025" MLS – 2002–2007 V-Rod with 4-1/8" Big Bore…

Only 2 left!

Cometic Cylinder Head Gasket Set. 4-1/4" .025" MLS – 2002–2007 V-Rod with 4-1/8" Big Bore… .025" MLS (Multi Layer Steel). MLS consists of a top and...

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£103.22
£103.22 - £103.22
£103.22
£101.79
£101.79 - £101.79
£101.79
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£103.22
£103.22 - £103.22
£103.22
£101.79
£101.79 - £101.79
£101.79

Cometic Cylinder Head Gasket Set. .030" MLS – 2002–2007 VRSCA; 2004–2005 VRSCB…

Only 2 left!

Cometic Cylinder Head Gasket Set. .030" MLS – 2002–2007 VRSCA; 2004–2005 VRSCB… Front & rear gasket to service one engine. OEM replacement refe...

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£103.22
£103.22 - £103.22
£103.22
£101.79
£101.79 - £101.79
£101.79
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£103.22
£103.22 - £103.22
£103.22
£101.79
£101.79 - £101.79
£101.79

Cometic Cylinder Head Gasket Set. .025" MLS – 2002–2007 VRSCA; 2004–2005 VRSCB…

Only 2 left!

Cometic Cylinder Head Gasket Set. .025" MLS – 2002–2007 VRSCA; 2004–2005 VRSCB… Front & rear gasket to service one engine. OEM replacement refe...

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£103.22
£103.22 - £103.22
£103.22
£101.79
£101.79 - £101.79
£101.79
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£27.71
£27.71 - £27.71
£27.71
£26.38
£26.38 - £26.38
£26.38

Cometic Cylinder Base Gasket Set. SLS 4-1/8" Big Bore – 1984–1999 Evo Big Twin with TP 4-1/8"…

Only 2 left!

Cometic Cylinder Base Gasket Set. SLS 4-1/8" Big Bore – 1984–1999 Evo Big Twin with TP 4-1/8"… Front & rear gasket for one engine. .020" thick ...

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£27.71
£27.71 - £27.71
£27.71
£26.38
£26.38 - £26.38
£26.38
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£27.71
£27.71 - £27.71
£27.71
£26.38
£26.38 - £26.38
£26.38

Cometic Cylinder Base Gasket Set. SLS 4-1/8" Big Bore – 1984–1999 Evo Big Twin with TP 4-1/8"…

Only 2 left!

Cometic Cylinder Base Gasket Set. SLS 4-1/8" Big Bore – 1984–1999 Evo Big Twin with TP 4-1/8"… Front & rear gasket for one engine. .010" thick ...

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£27.71
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£27.71
£26.38
£26.38 - £26.38
£26.38
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