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

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James Gaskets Oil Pump Gasket & Seal Kit. XL Sportster – 1991–2022 XL Sportster With .031" thick paper gasket. Incl. snap ring and pump cover o...

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James Gaskets Oil Pump Gasket & Seal Kit. XL Sportster – 1977–1990 XL Sportster

Only 4 left!

James Gaskets Oil Pump Gasket & Seal Kit. XL Sportster – 1977–1990 XL Sportster With .031" thick paper gaskets. Complete overhaul kit for the o...

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James Gaskets Oil Pump Gasket & Seal Kit. K, KH, XL Sportster – 1952–1956 K Model; KH Model; 1957–1976…

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James Gaskets Oil Pump Gasket & Seal Kit. K, KH, XL Sportster – 1952–1956 K Model; KH Model; 1957–1976… With paper gaskets. Complete overhaul k...

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James Gaskets Gasket Carburetor to Manifold. .016" Paper – 1957–1965 XL Sportster with OEM Linkert…

Only 2 left!

James Gaskets Gasket Carburetor to Manifold. .016" Paper – 1957–1965 XL Sportster with OEM Linkert… .016" fiber reinforced paper. OEM replacement r...

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£284.64
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Evolution Industries SS Exhaust Flange Kit. 12-Point Nuts – 1984–2026 Big Twin; 1986–2022 XL…

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Evolution Industries SS Exhaust Flange Kit. 12-Point Nuts – 1984–2026 Big Twin; 1986–2022 XL… 84-03/17-22 style. Polished. Cut from 360 stainless s...

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Kuryakyn Hypercharger Breather. EVO & Twin Cam – 1993–2017 Big Twin with CV or Delphi…

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Kuryakyn Hypercharger Breather. EVO & Twin Cam – 1993–2017 Big Twin with CV or Delphi… Plain aluminum finish. Included with Hyperchargers for h...

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Kuryakyn Bluegrass Breather Kit – 1993–1999 Evo Big Twin Most Carburetor…

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Kuryakyn Bluegrass Breather Kit – 1993–1999 Evo Big Twin Most Carburetor… Extremely adaptable breather kit. Kit includes chrome banjo fittings and ...

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Kuryakyn Ar Power Cones – Most 1984–2026 Big Twin; 1986–2022 XL…

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Kuryakyn Ar Power Cones – Most 1984–2026 Big Twin; 1986–2022 XL… For 1-3/4" head pipes. Power cones are in fact Anti-Reversion cones. Used to help ...

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Kuryakyn Scorpion TC Spark Plug & Head Bolt Covers – 1999–2017 Twin Cam

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Kuryakyn Scorpion TC Spark Plug & Head Bolt Covers – 1999–2017 Twin Cam Chrome plated. Scorpions add a touch of class to any Twin Cam engine. H...

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Kuryakyn Scorpion EVO Spark Plug & Head Bolt Covers – 1984–1999 Evo Big Twin; 1986–2003 XL…

Only 1 left!

Kuryakyn Scorpion EVO Spark Plug & Head Bolt Covers – 1984–1999 Evo Big Twin; 1986–2003 XL… Chrome plated. High quality covers that place a fin...

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Kuryakyn Tappet Block Covers. Chrome – 1984–1999 Evo Big Twin

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Kuryakyn Tappet Block Covers. Chrome – 1984–1999 Evo Big Twin Die cast aluminum construction. designed to cover the OEM tappet covers and transfer ...

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MCS Big Twin Plain Heat Shield Set Chrome – 1984–2009 Softail; 1984–1994 FXR…

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MCS Big Twin Plain Heat Shield Set Chrome – 1984–2009 Softail; 1984–1994 FXR… Smooth style front and rear heat shield set. Fits front & rear he...

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James Gaskets Motor & Gasket Seal Kit. XL 1000 – L1973–1985 XLH; XLCH 1000cc

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James Gaskets Motor & Gasket Seal Kit. XL 1000 – L1973–1985 XLH; XLCH 1000cc 0.016" Copper head gaskets; .031" paper base gaskets. Includes all...

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James Gaskets Motor Gasket Kit. 45" Flatheads – 1940–1973 45" Flatheads; 750cc W/WL/G/GE…

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James Gaskets Motor Gasket Kit. 45" Flatheads – 1940–1973 45" Flatheads; 750cc W/WL/G/GE… 0.020" embossed copper head gaskets. Includes both early ...

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Kuryakyn Stepped Spark Plug & Head Bolt Covers – 1999–2016 FLT/Touring; 2009–2016 Trikes

Only 2 left!

Kuryakyn Stepped Spark Plug & Head Bolt Covers – 1999–2016 FLT/Touring; 2009–2016 Trikes Chrome plated. Installs with four set screws per cover...

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Kuryakyn Formed Breather Hoses – 1999–2017 Twin Cam

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Kuryakyn Formed Breather Hoses – 1999–2017 Twin Cam OEM style formed rubber hose Fitment 99-17 Twin Cam (NU) Product Details Brand: Kuryakyn Cat...

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Kuryakyn Breather Bolts – 1999–2017 Twin Cam

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Kuryakyn Breather Bolts – 1999–2017 Twin Cam 1 3/4" Overall length (1/2" longer than stock). Incl. pre-formed rubber breather hose that fits some T...

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Andrews Chain Drive Cam Shaft Set TW50/.510" – 1999–2006 Twin Cam

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Andrews Chain Drive Cam Shaft Set TW50/.510" – 1999–2006 Twin Cam .510" valve lift. Set includes two chain driven camshafts. A cam drive installati...

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MCS Jet Needle (Mid-range) CV Carb. N72R – 1988–2006 XL Sportster; 1990–2006 Big…

Only 3 left!

MCS Jet Needle (Mid-range) CV Carb. N72R – 1988–2006 XL Sportster; 1990–2006 Big… Replacement needle to adjust the mid-range on Keihin CV carbureto...

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MCS Slow Jet (Pilot Jet) Keihin CV Carb .48 – 1988–2006 XL Sportster; 1990–2006 Big…

Only 2 left!

MCS Slow Jet (Pilot Jet) Keihin CV Carb .48 – 1988–2006 XL Sportster; 1990–2006 Big… OEM replacement reference 27165-90. Fitment 88-06 XL Sportster...

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James Gaskets Pushrod Cover Seal Kit – L1981–1984 Shovelhead

Only 3 left!

James Gaskets Pushrod Cover Seal Kit – L1981–1984 Shovelhead Includes quad style lower and O-ring style middle and upper seals. Complete kit. Fitme...

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James Gaskets Pushrod Cover Seal Kit – L79-E81 Shovelhead

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James Gaskets Pushrod Cover Seal Kit – L79-E81 Shovelhead Includes o-ring lower; middle and upper seals. Complete kit. Fitment L79-E81 Shovelhead (...

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James Gaskets Pushrod Cover Seal Kit. Rubber – 1948–1965 Panhead; 66-E79 Shovelhead

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James Gaskets Pushrod Cover Seal Kit. Rubber – 1948–1965 Panhead; 66-E79 Shovelhead Rubber lower; middle and upper seals to replace the OEM style c...

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James Gaskets Pushrod Cover Seal Kit. Cork – 1948–1965 Panhead; 66-E79 Shovelhead

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James Gaskets Pushrod Cover Seal Kit. Cork – 1948–1965 Panhead; 66-E79 Shovelhead Lower; middle and upper seals in the OEM cork material. OEM repla...

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