Skip to content
Find us Hours of Business Email Us Shipping Cookie policy Returns Terms & Conditions Privacy Policy Refunds

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.

Filters

£85.50 - £85.50
£85.50
£86.16
£86.16 - £86.16
£86.16

James Gaskets Top End Gasket Kit. Shovelhead 3-5/8" Big Bore – 1966–1984 Shovelheaed with 3-5/8" Big…

Only 3 left!

James Gaskets Top End Gasket Kit. Shovelhead 3-5/8" Big Bore – 1966–1984 Shovelheaed with 3-5/8" Big… 3-5/8" big bore. Includes .045" blue PTFE coa...

View full details
£85.50 - £85.50
£85.50
£86.16
£86.16 - £86.16
£86.16
£107.22 - £107.22
£107.22
£109.64
£109.64 - £109.64
£109.64

James Gaskets Top End Gasket Kit. Shovelhead – 1966–1984 Shovelhead

Only 5 left!

James Gaskets Top End Gasket Kit. Shovelhead – 1966–1984 Shovelhead Incl. .045" 3-7/16" / 3.5" graphite head gaskets with Firering®; Foamet® (An al...

View full details
£107.22 - £107.22
£107.22
£109.64
£109.64 - £109.64
£109.64
£25.41 - £25.41
£25.41
£26.99
£26.99 - £26.99
£26.99

MCS Exhaust Flange and Retainer Kit. Black – 1984–2025 Big Twin; 1986–2022 XL…

Only 3 left!

MCS Exhaust Flange and Retainer Kit. Black – 1984–2025 Big Twin; 1986–2022 XL… Steel. Complete kit in black wrinkle finish with everything you need...

View full details
£25.41 - £25.41
£25.41
£26.99
£26.99 - £26.99
£26.99
Save 2% Save %
£40.59
£40.59 - £40.59
£40.59
£39.74
£39.74 - £39.74
£39.74

Colony Knuckle Banjo Style Rocker Cover Oil Feed Fittings – 1936–1941 Knucklehead

Only 2 left!

Colony Knuckle Banjo Style Rocker Cover Oil Feed Fittings – 1936–1941 Knucklehead Chrome plated. OEM reproduction. For rocker oil feed line. Kit in...

View full details
£40.59
£40.59 - £40.59
£40.59
£39.74
£39.74 - £39.74
£39.74
Save 2% Save %
Sold out
£43.68
£43.68 - £43.68
£43.68
£43.15
£43.15 - £43.15
£43.15

Colony 45" Cyl Head Nut Kit – 1929–1941 45" SV; 1926–1932 SINGLE CYL

Out of stock

Colony 45" Cyl Head Nut Kit – 1929–1941 45" SV; 1926–1932 SINGLE CYL Parkerized; 45" with cast iron heads Fitment 29-41 45" SV; 26-32 SINGLE CYL. (...

View full details
£43.68
£43.68 - £43.68
£43.68
£43.15
£43.15 - £43.15
£43.15
Sold out
Save 1% Save %
£17.26
£17.26 - £17.26
£17.26
£17.02
£17.02 - £17.02
£17.02

James Gaskets Oil Pump Gasket & Seal Kit. Evo B.T. RCM – 1992–1999 Evo Big Twin

Only 4 left!

James Gaskets Oil Pump Gasket & Seal Kit. Evo B.T. RCM – 1992–1999 Evo Big Twin Includes .010" RCM (Rubber Coated Metal with silicone bead) gas...

View full details
£17.26
£17.26 - £17.26
£17.26
£17.02
£17.02 - £17.02
£17.02
Save 1% Save %
Save 1% Save %
£16.32
£16.32 - £16.32
£16.32
£16.10
£16.10 - £16.10
£16.10

James Gaskets Oil Pump Gasket & Seal Kit. Evo B.T – 1992–1999 Evo Big Twin

Only 4 left!

James Gaskets Oil Pump Gasket & Seal Kit. Evo B.T – 1992–1999 Evo Big Twin With black paper gaskets. Complete overhaul kit for the oil pump. Fi...

View full details
£16.32
£16.32 - £16.32
£16.32
£16.10
£16.10 - £16.10
£16.10
Save 1% Save %
Save 1% Save %
£16.32
£16.32 - £16.32
£16.32
£16.10
£16.10 - £16.10
£16.10

James Gaskets Oil Pump Gasket & Seal Kit. Shovelhead – 1968–1980 Big Twin

Only 3 left!

James Gaskets Oil Pump Gasket & Seal Kit. Shovelhead – 1968–1980 Big Twin With black paper gaskets. Complete overhaul kit for the oil pump. Fit...

View full details
£16.32
£16.32 - £16.32
£16.32
£16.10
£16.10 - £16.10
£16.10
Save 1% Save %
Save 1% Save %
£16.32
£16.32 - £16.32
£16.32
£16.10
£16.10 - £16.10
£16.10

James Gaskets Oil Pump Gasket & Seal Kit. Pan/Early Shovel – 1948–1965 Panhead; 1966–1967 Early…

Only 3 left!

James Gaskets Oil Pump Gasket & Seal Kit. Pan/Early Shovel – 1948–1965 Panhead; 1966–1967 Early… Paper gaskets. Complete overhaul kit for the o...

View full details
£16.32
£16.32 - £16.32
£16.32
£16.10
£16.10 - £16.10
£16.10
Save 1% Save %
Save 1% Save %
£15.71
£15.71 - £15.71
£15.71
£15.49
£15.49 - £15.49
£15.49

James Gaskets Oil Pump Gasket & Seal Kit. Knucklehead – 1936–1947 Knucklehead; 48-E50 Panhead

Only 3 left!

James Gaskets Oil Pump Gasket & Seal Kit. Knucklehead – 1936–1947 Knucklehead; 48-E50 Panhead Includes paper gaskets. Complete overhaul kit for...

View full details
£15.71
£15.71 - £15.71
£15.71
£15.49
£15.49 - £15.49
£15.49
Save 1% Save %
Save 1% Save %
£14.83
£14.83 - £14.83
£14.83
£14.62
£14.62 - £14.62
£14.62

James Gaskets Oil Pump Gasket & Seal Kit. 45" Flathead – 1929–1973 45" (750cc) Flathead

Only 3 left!

James Gaskets Oil Pump Gasket & Seal Kit. 45" Flathead – 1929–1973 45" (750cc) Flathead Includes paper gaskets and hardware. Fitment 29-73 45" ...

View full details
£14.83
£14.83 - £14.83
£14.83
£14.62
£14.62 - £14.62
£14.62
Save 1% Save %
Save 1% Save %
£16.32
£16.32 - £16.32
£16.32
£16.10
£16.10 - £16.10
£16.10

James Gaskets Oil Pump Gasket & Seal Kit. Shovel/Evo B.T – 1981–1991 Big Twin

Only 4 left!

James Gaskets Oil Pump Gasket & Seal Kit. Shovel/Evo B.T – 1981–1991 Big Twin With .031" paper gaskets. Complete overhaul kit for the oil pump....

View full details
£16.32
£16.32 - £16.32
£16.32
£16.10
£16.10 - £16.10
£16.10
Save 1% Save %
Save 1% Save %
£37.58
£37.58 - £37.58
£37.58
£37.12
£37.12 - £37.12
£37.12

Colony Cam Cover Mount Kit – 2002–2017 V-Rod

Only 2 left!

Colony Cam Cover Mount Kit – 2002–2017 V-Rod Polished chrome allen Fitment 02-17 V-Rod (NU) Product Details Brand: Colony Category: MOTOR PARTS ...

View full details
£37.58
£37.58 - £37.58
£37.58
£37.12
£37.12 - £37.12
£37.12
Save 1% Save %
£24.62 - £24.62
£24.62
£28.37
£28.37 - £28.37
£28.37

Colony Cam Cover Mount Kit – 2002–2017 V-Rod

Only 2 left!

Colony Cam Cover Mount Kit – 2002–2017 V-Rod Chrome allen Fitment 02-17 V-Rod (NU) Product Details Brand: Colony Category: MOTOR PARTS > CAM ...

View full details
£24.62 - £24.62
£24.62
£28.37
£28.37 - £28.37
£28.37
£11.24 - £11.24
£11.24
£12.17
£12.17 - £12.17
£12.17

Colony Upper Crankcase Plug & Gasket Kt – 2002–2017 V-Rod

Only 2 left!

Colony Upper Crankcase Plug & Gasket Kt – 2002–2017 V-Rod Chrome Fitment 02-17 V-Rod (NU) Product Details Brand: Colony Category: MOTOR PART...

View full details
£11.24 - £11.24
£11.24
£12.17
£12.17 - £12.17
£12.17
Sold out
£8.75
£8.75 - £8.75
£8.75
£8.04
£8.04 - £8.04
£8.04

Colony Air Cleaner Cover Mount Bolt – 1984–1999 Evo Big Twin; 1999–2017 Twin…

Out of stock

Colony Air Cleaner Cover Mount Bolt – 1984–1999 Evo Big Twin; 1999–2017 Twin… Chrome. Domed Hex. Single center bolt that fits all round (84-99); ov...

View full details
£8.75
£8.75 - £8.75
£8.75
£8.04
£8.04 - £8.04
£8.04
Sold out
Sold out
£5.15
£5.15 - £5.15
£5.15
£4.73
£4.73 - £4.73
£4.73

Colony Air Cleaner Cover Mount Bolt – 1984–1999 Evo Big Twin; 1999–2017 Twin…

Out of stock

Colony Air Cleaner Cover Mount Bolt – 1984–1999 Evo Big Twin; 1999–2017 Twin… Chrome. Button head. Flathead Allen & countersunk washer. 5/16-18...

View full details
£5.15
£5.15 - £5.15
£5.15
£4.73
£4.73 - £4.73
£4.73
Sold out
Save 2% Save %
£18.46
£18.46 - £18.46
£18.46
£18.06
£18.06 - £18.06
£18.06

Colony Linkert Air Cleaner Mount Screw & Lock Kit. Black – 1936–1954 Big Twin

Only 3 left!

Colony Linkert Air Cleaner Mount Screw & Lock Kit. Black – 1936–1954 Big Twin Black parkerized. OEM reproduction hardware for mounting the air ...

View full details
£18.46
£18.46 - £18.46
£18.46
£18.06
£18.06 - £18.06
£18.06
Save 2% Save %
Save 8% Save %
£8.55
£8.55 - £8.55
£8.55
£7.86
£7.86 - £7.86
£7.86

Colony Air Cleaner Backplate Mount Kit – 1966–1977 Big Twin

Only 2 left!

Colony Air Cleaner Backplate Mount Kit – 1966–1977 Big Twin Zinc plated. OEM style reproduction. Incl. 3 slotted bolts; 3 star washers; 1 hex bolt ...

View full details
£8.55
£8.55 - £8.55
£8.55
£7.86
£7.86 - £7.86
£7.86
Save 8% Save %
£17.02 - £17.02
£17.02
£19.61
£19.61 - £19.61
£19.61

Colony Exhaust Stud & Nut Kit – 1984–2026 Big Twin; 1986–2022 XL…

Only 1 left!

Colony Exhaust Stud & Nut Kit – 1984–2026 Big Twin; 1986–2022 XL… Incl. 4 studs and 4 hex nuts. Mounts exhaust to cylinder heads. Note: Exhaust...

View full details
£17.02 - £17.02
£17.02
£19.61
£19.61 - £19.61
£19.61
Save 1% Save %
£33.53
£33.53 - £33.53
£33.53
£33.12
£33.12 - £33.12
£33.12

Colony Evo Lower Rocker Box Mount Kit. Zinc – 1984–1999 Evo Big Twin; 1986–2003 XL…

Only 2 left!

Colony Evo Lower Rocker Box Mount Kit. Zinc – 1984–1999 Evo Big Twin; 1986–2003 XL… Zinc plated steel. OEM style reproduction; incl. bolts and wash...

View full details
£33.53
£33.53 - £33.53
£33.53
£33.12
£33.12 - £33.12
£33.12
Save 1% Save %
Sold out
£12.18
£12.18 - £12.18
£12.18
£11.20
£11.20 - £11.20
£11.20

Colony Motor Mount Bolt Kit. Chrome – 2000–2017 Softail

Out of stock

Colony Motor Mount Bolt Kit. Chrome – 2000–2017 Softail Chrome plated flathead Allen heads with countersunk washers. Used to mount mount motor moun...

View full details
£12.18
£12.18 - £12.18
£12.18
£11.20
£11.20 - £11.20
£11.20
Sold out
Sold out
£22.86 - £22.86
£22.86
£26.34
£26.34 - £26.34
£26.34

Colony Evo Countersunk Rocker Cover Screw Kit – 1984–1999 Evo Big Twin; 1986–2022 XL…

Out of stock

Colony Evo Countersunk Rocker Cover Screw Kit – 1984–1999 Evo Big Twin; 1986–2022 XL… Chrome plated. With 8 countersunk flat head allenhead (socket...

View full details
£22.86 - £22.86
£22.86
£26.34
£26.34 - £26.34
£26.34
Sold out
Save 2% Save %
£46.05
£46.05 - £46.05
£46.05
£45.08
£45.08 - £45.08
£45.08

Colony Floorboard Support Rod Mount Kit. Chrome – All 1932–1973 45" & Servi-Car Models

Only 2 left!

Colony Floorboard Support Rod Mount Kit. Chrome – All 1932–1973 45" & Servi-Car Models Chrome. Left & right side bar; front & rear supp...

View full details
£46.05
£46.05 - £46.05
£46.05
£45.08
£45.08 - £45.08
£45.08
Save 2% Save %

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare