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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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£21.88
£21.88 - £21.88
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£21.58
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£21.58

James Gaskets James O-ring, Cylinder Head Stud. Thin – 1999–2003 Twin Cam

Only 2 left!

James Gaskets James O-ring, Cylinder Head Stud. Thin – 1999–2003 Twin Cam Viton heat resistant rubber. Extra thin. For .036" thick head gaskets. 4 ...

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£21.88
£21.88 - £21.88
£21.88
£21.58
£21.58 - £21.58
£21.58
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£21.88
£21.88 - £21.88
£21.88
£21.58
£21.58 - £21.58
£21.58

James Gaskets James O-ring, Cylinder Head Stud. Thin – 1999–2003 Twin Cam

Only 2 left!

James Gaskets James O-ring, Cylinder Head Stud. Thin – 1999–2003 Twin Cam Viton heat resistant rubber. Extra thin. For .045" tick head gaskets; as ...

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£21.88
£21.88 - £21.88
£21.88
£21.58
£21.58 - £21.58
£21.58
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£21.88
£21.88 - £21.88
£21.88
£21.58
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£21.58

James Gaskets James O-ring, Cylinder Dowel – 1986–2007 XL Sportster; 1984–1999 Big…

Only 3 left!

James Gaskets James O-ring, Cylinder Dowel – 1986–2007 XL Sportster; 1984–1999 Big… Oil return o-ring. For use with .045" (thinner) & .062" (OE...

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£21.88
£21.88 - £21.88
£21.88
£21.58
£21.58 - £21.58
£21.58
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£26.71
£26.71 - £26.71
£26.71
£26.34
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£26.34

James Gaskets Inspection & Derby Cover Seal Kit. RCM – 1999–2006 Softail; 1999–2005 Dyna

Only 3 left!

James Gaskets Inspection & Derby Cover Seal Kit. RCM – 1999–2006 Softail; 1999–2005 Dyna RCM (Rubber Coated Metal). Complete seal set made from...

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£26.71
£26.71 - £26.71
£26.71
£26.34
£26.34 - £26.34
£26.34
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£26.70
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£26.70
£26.33
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£26.33

James Gaskets Inspection & Derby Cover Seal Kit. RCM – 1999–2006 FLT/Touring

Only 4 left!

James Gaskets Inspection & Derby Cover Seal Kit. RCM – 1999–2006 FLT/Touring RCM (Rubber Coated Metal) inspection cover and a paper silicone be...

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£26.70
£26.70 - £26.70
£26.70
£26.33
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£26.33
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£38.14 - £38.14
£38.14
£38.43
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£38.43

James Gaskets Cam Gear Change Gasket Kit. Evo B.T – 1993–1999 Evo Big Twin

Only 3 left!

James Gaskets Cam Gear Change Gasket Kit. Evo B.T – 1993–1999 Evo Big Twin .036" thick metal base cam cover gasket with paper facings and single la...

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£38.14 - £38.14
£38.14
£38.43
£38.43 - £38.43
£38.43
£38.14 - £38.14
£38.14
£38.43
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£38.43

James Gaskets Cam Gear Change Gasket Kit. 70-92 B.T – 1970–1992 Big Twin

Only 3 left!

James Gaskets Cam Gear Change Gasket Kit. 70-92 B.T – 1970–1992 Big Twin .036" thick metal base cam cover gasket with paper facings and single laye...

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£38.14 - £38.14
£38.14
£38.43
£38.43 - £38.43
£38.43
£154.82 - £154.82
£154.82
£158.32
£158.32 - £158.32
£158.32

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

Only 2 left!

James Gaskets Motor Gasket Kit. 3-3/4" Bore MLS – 1999–2004 88" Twin Cam Includes .040" thick 3-3/4" bore MLS (Multi Layer Steel) head gaskets; RCM...

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£154.82 - £154.82
£154.82
£158.32
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£158.32
£123.97 - £123.97
£123.97
£126.77
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£126.77

James Gaskets Motor Gasket Kit. 3-3/4" Bore Twin Cam – 2005–2017 88"/96" Twin Cam

Only 2 left!

James Gaskets Motor Gasket Kit. 3-3/4" Bore Twin Cam – 2005–2017 88"/96" Twin Cam .036" thick 3-3/4" bore PTFE coated head gaskets with Fire-ring. ...

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£123.97 - £123.97
£123.97
£126.77
£126.77 - £126.77
£126.77
£154.85 - £154.85
£154.85
£158.35
£158.35 - £158.35
£158.35

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

Only 2 left!

James Gaskets Motor Gasket Kit. 3-7/8" Bore Twin Cam – 2005–2017 95"/103" Twin Cam .040" thick 3-7/8" bore MLS (Multi Layer Steel) head gaskets. In...

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£154.85 - £154.85
£154.85
£158.35
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£158.35
Sold out
£127.76 - £127.76
£127.76
£130.65
£130.65 - £130.65
£130.65

James Gaskets Motor Gasket Kit. 3-3/4" Bore Twin Cam – 2005–2017 88"/96" Twin Cam

Out of stock

James Gaskets Motor Gasket Kit. 3-3/4" Bore Twin Cam – 2005–2017 88"/96" Twin Cam .045" thick 3-3/4" bore PTFE coated head gaskets with Fire-ring. ...

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£127.76 - £127.76
£127.76
£130.65
£130.65 - £130.65
£130.65
Sold out
£118.35 - £118.35
£118.35
£121.03
£121.03 - £121.03
£121.03

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

Only 2 left!

James Gaskets Top End Gasket Kit. Twin Cam. PTFE – 1999–2004 88" 1450cc Twin Cam 3-3/4" bore with .036" blue PTFE coated head gaskets; RCM (Rubber ...

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£118.35 - £118.35
£118.35
£121.03
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£121.03
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£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 3 left!

James Gaskets Top End Gasket Kit. Twin Cam. Firering – 1999–2004 88" 1450cc Twin Cam 3-3/4" bore with 0.036" Firering head gaskets ; RCM (Rubber Co...

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£118.35 - £118.35
£118.35
£121.03
£121.03 - £121.03
£121.03
£118.35 - £118.35
£118.35
£121.03
£121.03 - £121.03
£121.03

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

Only 2 left!

James Gaskets Top End Gasket Kit. Twin Cam 3-7/8" Bore – 2005–2017 95/103" Twin Cam 0.036" PTFE coated head gaskets with Firering®; RCM (Rubber Coa...

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£118.35 - £118.35
£118.35
£121.03
£121.03 - £121.03
£121.03
£151.96 - £151.96
£151.96
£155.39
£155.39 - £155.39
£155.39

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

Only 3 left!

James Gaskets Top End Gasket Kit. Twin Cam 3-7/8" Bore MLS – 2005–2017 95/103" Twin Cam 0.040" MLS head gaskets; RCM (Rubber Coated Metal) rocker b...

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£151.96 - £151.96
£151.96
£155.39
£155.39 - £155.39
£155.39
£118.35 - £118.35
£118.35
£121.03
£121.03 - £121.03
£121.03

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

Only 3 left!

James Gaskets Top End Gasket Kit. Twin Cam 3-3/4" Bore – 2005–2017 88"/96" Twin Cam A/B .036" Fire-ring head gaskets; RCM (rubber Coated Metal) roc...

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£118.35 - £118.35
£118.35
£121.03
£121.03 - £121.03
£121.03
£146.23 - £146.23
£146.23
£149.54
£149.54 - £149.54
£149.54

James Gaskets Motor Gasket Kit. 92-99 Evo B.T – 1992–1999 Evo Big Twin

Only 4 left!

James Gaskets Motor Gasket Kit. 92-99 Evo B.T – 1992–1999 Evo Big Twin Includes 0.040" MLS head gaskets; RCM (Rubber Coated Metal) cylinder base an...

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£146.23 - £146.23
£146.23
£149.54
£149.54 - £149.54
£149.54
£115.41 - £115.41
£115.41
£118.02
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£118.02

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 3 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… Special with S&S®/Landmark® style rocker b...

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£115.41 - £115.41
£115.41
£118.02
£118.02 - £118.02
£118.02
£80.09 - £80.09
£80.09
£80.71
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£80.71

James Gaskets Top End Gasket Kit. Panhead – 1948–1965 Panhead

Only 3 left!

James Gaskets Top End Gasket Kit. Panhead – 1948–1965 Panhead Incl. 0.045" head gaskets with Firering®; Aluminum Foamet® (An aluminum base with a n...

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£80.09 - £80.09
£80.09
£80.71
£80.71 - £80.71
£80.71
£126.77 - £126.77
£126.77
£129.63
£129.63 - £129.63
£129.63

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

Only 2 left!

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

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£126.77 - £126.77
£126.77
£129.63
£129.63 - £129.63
£129.63
£160.56 - £160.56
£160.56
£164.19
£164.19 - £164.19
£164.19

James Gaskets Top End Gasket Kit. XL1200. MLS – 1991–2003 XL1200

Only 2 left!

James Gaskets Top End Gasket Kit. XL1200. MLS – 1991–2003 XL1200 With 0.040" MLS (Multi Layer Steel) head gaskets; RCM (Rubber Coated Metal) cylind...

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£160.56 - £160.56
£160.56
£164.19
£164.19 - £164.19
£164.19
£137.63 - £137.63
£137.63
£140.75
£140.75 - £140.75
£140.75

James Gaskets Top End Gasket Kit. XL1200. MLS – 1988–1990 XL1200

Only 3 left!

James Gaskets Top End Gasket Kit. XL1200. MLS – 1988–1990 XL1200 With 0.040" MLS (Multi Layer Steel) head gaskets; RCM (Rubber Coated Metal) cylind...

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£137.63 - £137.63
£137.63
£140.75
£140.75 - £140.75
£140.75
£88.02 - £88.02
£88.02
£88.70
£88.70 - £88.70
£88.70

James Gaskets Rocker Cover Gasket Kit. Evo XL. RCM – 1991–2003 XL883/1200

Only 4 left!

James Gaskets Rocker Cover Gasket Kit. Evo XL. RCM – 1991–2003 XL883/1200 Includes RCM (Rubber Coated Metal with silicone bead) rocker box base gas...

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£88.02 - £88.02
£88.02
£88.70
£88.70 - £88.70
£88.70
£215.11 - £215.11
£215.11
£219.97
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£219.97

James Gaskets Motor Gasket & Seal Kit. XL 883/1200. MLS – 1991–2003 XL883/1200

Only 3 left!

James Gaskets Motor Gasket & Seal Kit. XL 883/1200. MLS – 1991–2003 XL883/1200 0.040" MLS (Multi Layer Steel) head gaskets; RCM (Rubber Coated ...

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£215.11 - £215.11
£215.11
£219.97
£219.97 - £219.97
£219.97

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