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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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£31.13
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Cometic Gasket Derby Cover – L1984–1998 Big Twin

Only 2 left!

Cometic Gasket Derby Cover – L1984–1998 Big Twin Gasket replacement for the OEM style O-ring. OEM replacement reference 25416-84. Fitment L84-98 Bi...

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£31.13
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£31.13
£29.64
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£29.64
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£162.20
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£159.95

Cometic Gasket Primary Housing. .060" AFM. 5-Pk – 2007–2016 FLT/Touring

Only 2 left!

Cometic Gasket Primary Housing. .060" AFM. 5-Pk – 2007–2016 FLT/Touring .060" AFM (Aluminum Foamet Material). OEM replacement reference 34901-07. C...

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£162.20
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£83.31
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Cometic 6-Speed Transmission Gasket & Seal Kit – 2007–2016 FLT/Touring

Out of stock

Cometic 6-Speed Transmission Gasket & Seal Kit – 2007–2016 FLT/Touring Everything you need when assembling the transmission. Fitment 07-16 FLT/...

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£83.31
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£83.31
£80.43
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£80.43
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£83.31
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£80.43
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£80.43

Cometic 6-Speed Transmission Gasket & Seal Kit – 2007–2017 Softail

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Cometic 6-Speed Transmission Gasket & Seal Kit – 2007–2017 Softail Everything you need when assembling the transmission. Fitment 07-17 Softail ...

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£83.31
£80.43
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£80.43
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£100.73
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£97.24
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Cometic 6-Speed Primary Cover Gasket & Seal Kit. AFM – 2007–2016 FLT/Touring; 2009–2016 Trike

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Cometic 6-Speed Primary Cover Gasket & Seal Kit. AFM – 2007–2016 FLT/Touring; 2009–2016 Trike Complete outer & inner primary cover gasket s...

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£97.24
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£168.08
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Cometic EST Motor Gasket Kit. 3-3/4" Bore – 2006–2017 96" Dyna (with 1999–2010 Style…

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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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£16.17
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Cometic Pushrod Cover Seal Kit – 1991–2003 XL Sportster

Out of stock

Cometic Pushrod Cover Seal Kit – 1991–2003 XL Sportster OEM style o-ring upper and lower seals. Includes a complete set of 8 seals to service one e...

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£16.17
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£45.18
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Cometic Cylinder Head Gasket Set. 3-13/16" .043" Copper – 1984–1999 Evo Big Twin

Out of stock

Cometic Cylinder Head Gasket Set. 3-13/16" .043" Copper – 1984–1999 Evo Big Twin .043" thick copper. Fitment 84-99 Evo Big Twin (NU) Product Detail...

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Cometic Gasket Primary Shifter Hole – 2018–2025 Softail; 2006–2017 Dyna. (Mid…

Out of stock

Cometic Gasket Primary Shifter Hole – 2018–2025 Softail; 2006–2017 Dyna. (Mid… 1 used. Small round washer type gasket. Fits inside of inner primary...

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£9.69
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Cometic Gasket Mainshaft Seal Retainer – 1952–1956 K; KH; 57-E84 XL Sportster

Only 2 left!

Cometic Gasket Mainshaft Seal Retainer – 1952–1956 K; KH; 57-E84 XL Sportster OEM replacement reference 35169-52. Note: See James 901005 for comple...

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£8.92
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£26.32
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Cometic Oil Seal. Balance Support Interconnect – 2000–2017 Twin Cam B

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Cometic Oil Seal. Balance Support Interconnect – 2000–2017 Twin Cam B 1 used for engine balancer. Repl. 45359-00 Fitment 00-17 Twin Cam B (NU) Prod...

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James Gaskets O-ring. Oil Filter Cup – 1953–1956 K; KH; L66-E82 FL Models with…

Only 2 left!

James Gaskets O-ring. Oil Filter Cup – 1953–1956 K; KH; L66-E82 FL Models with… OEM replacement reference 63879-53 Fitment 53-56 K; KH; L66-E82 FL ...

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£54.84
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CPV Universal Oil Filter Plate

Only 2 left!

CPV Universal Oil Filter Plate Plain aluminum backing plate with feed and return holes tapped and threaded. Two threaded mounting studs included. P...

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£54.84
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£54.08
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£222.20
£223.90
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£223.90

Jims Twin Cam Bike Pocket. Chrome, ''Smooth'' – 2001–2017 Twin Cam; S&S T-series Engines

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Jims Twin Cam Bike Pocket. Chrome, ''Smooth'' – 2001–2017 Twin Cam; S&S T-series Engines Attaches to all stock Twin Cam gear covers. Twist the ...

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Jims Twin Cam Bike Pocket. Polished, ''Smooth'' – 2001–2017 Twin Cam; S&S T-series Engines

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Jims Twin Cam Bike Pocket. Polished, ''Smooth'' – 2001–2017 Twin Cam; S&S T-series Engines Attaches to all stock Twin Cam gear covers. Twist th...

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£222.20
£223.90
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£89.89
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£89.89
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Namz O2 Sensor Inline Enrichment Device – 2006 Dyna

Only 2 left!

Namz O2 Sensor Inline Enrichment Device – 2006 Dyna Adj. 14.6-14.2:1 afr Fitment 2006 Dyna (NU) Product Details Brand: Namz Category: INTAKE >...

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£89.89
£88.64
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£39.02
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£37.67
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Namz Oil Line Hose Clamps. 1/4" to 5/16" ID. Silver

Only 2 left!

Namz Oil Line Hose Clamps. 1/4" to 5/16" ID. Silver Extruded from brass and powder coated in a matte metallic finish. Product Details Brand: Namz...

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Namz Oil Line Hose Clamps. 1/4" to 5/16" ID. Brass

Only 1 left!

Namz Oil Line Hose Clamps. 1/4" to 5/16" ID. Brass Extruded from brass and powder coated in a matte metallic finish. Product Details Brand: Namz ...

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£39.02
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£39.02
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£39.02
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Namz Oil Line Hose Clamps. 1/4" to 5/16" ID. Copper

Only 2 left!

Namz Oil Line Hose Clamps. 1/4" to 5/16" ID. Copper Extruded from brass and powder coated in a matte metallic finish. Product Details Brand: Namz...

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£39.02
£39.02 - £39.02
£39.02
£37.67
£37.67 - £37.67
£37.67
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£39.02
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£37.67
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£37.67

Namz Oil Line Hose Clamps. 1/4" to 5/16" ID. Black

Only 3 left!

Namz Oil Line Hose Clamps. 1/4" to 5/16" ID. Black Extruded from brass and powder coated in a matte metallic finish. Product Details Brand: Namz ...

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£39.02
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£39.02
£37.67
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£37.67
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£102.00
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£90.09
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Daytona LCD Oil Temp Gauge/Dipstick, Hex – 2007–2016 FLT/Touring

Only 3 left!

Daytona LCD Oil Temp Gauge/Dipstick, Hex – 2007–2016 FLT/Touring Chrome face. Built-in blue backlight for viewing. Switchable Celsius (C°) or Fahre...

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£102.00
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£102.00
£90.09
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£80.61
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£71.25
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£71.25

Daytona Oil Temp Gauge/Dipstick – 1982–2003 XL Sportster

Out of stock

Daytona Oil Temp Gauge/Dipstick – 1982–2003 XL Sportster Chrome face. Built-in blue backlight for viewing. Switchable Celsius (C°) or Fahrenheit (F...

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£80.61
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£80.61
£71.25
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£71.25
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£81.45
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£77.54
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Daytona LCD Oil Temp Gauge/Dipstick – 2000–2017 Softail

Only 2 left!

Daytona LCD Oil Temp Gauge/Dipstick – 2000–2017 Softail Chrome face. Built-in blue backlight for viewing. Switchable Celsius (C°) or Fahrenheit (F°...

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£81.45
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£81.45
£77.54
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£80.61
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Daytona Oil Temp Gauge/Dipstick – 1984–1999 Softail

Only 3 left!

Daytona Oil Temp Gauge/Dipstick – 1984–1999 Softail Chrome face. Built-in blue backlight for viewing. Switchable Celsius (C°) or Fahrenheit (F°). C...

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£80.61
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£71.25
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