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

£134.03 - £134.03
£134.03
£137.06
£137.06 - £137.06
£137.06

James Gaskets Top End Gasket Kit. Evo B.T. MLS – 1992–1999 Evo Big Twin

Only 3 left!

James Gaskets Top End Gasket Kit. Evo B.T. MLS – 1992–1999 Evo Big Twin .040" MLS (Multi Layer Steel) head gaskets; RCM (Rubber Coated Metal) cylin...

View full details
£134.03 - £134.03
£134.03
£137.06
£137.06 - £137.06
£137.06
Save 1% Save %
£27.85
£27.85 - £27.85
£27.85
£27.46
£27.46 - £27.46
£27.46

James Gaskets Oil Seal 6Th Gear Transmission – 2007–2026 Softail; 2006–2017 Dyna…

Only 3 left!

James Gaskets Oil Seal 6Th Gear Transmission – 2007–2026 Softail; 2006–2017 Dyna… 1 used. Main drive gear end. OEM replacement reference 12077 Fitm...

View full details
£27.85
£27.85 - £27.85
£27.85
£27.46
£27.46 - £27.46
£27.46
Save 1% Save %
Save 1% Save %
£10.56
£10.56 - £10.56
£10.56
£10.41
£10.41 - £10.41
£10.41

James Gaskets James Oil Seal, Transmission Mainshaft – 2006–2017 Dyna; 2007–2025 Softail…

Only 3 left!

James Gaskets James Oil Seal, Transmission Mainshaft – 2006–2017 Dyna; 2007–2025 Softail… Double lip. OEM replacement reference 12074. Fitment 06-1...

View full details
£10.56
£10.56 - £10.56
£10.56
£10.41
£10.41 - £10.41
£10.41
Save 1% Save %
Save 1% Save %
£14.17
£14.17 - £14.17
£14.17
£13.97
£13.97 - £13.97
£13.97

James Gaskets Fill Plug for Chain Housing & Horn Bumper – Chain Housing Fill Plug: 1979–1984…

Only 2 left!

James Gaskets Fill Plug for Chain Housing & Horn Bumper – Chain Housing Fill Plug: 1979–1984… Rubber. Used as filler plug on early FLT models w...

View full details
£14.17
£14.17 - £14.17
£14.17
£13.97
£13.97 - £13.97
£13.97
Save 1% Save %
Sold out
£12.67
£12.67 - £12.67
£12.67
£12.49
£12.49 - £12.49
£12.49

James Gaskets James O-ring, Oil Tank Fill Plug – 2000–2017 Softail

Out of stock

James Gaskets James O-ring, Oil Tank Fill Plug – 2000–2017 Softail OEM replacement reference 11345 Fitment 00-17 Softail (Excl. FXSB; FXCW/C) (NU) ...

View full details
£12.67
£12.67 - £12.67
£12.67
£12.49
£12.49 - £12.49
£12.49
Sold out
Save 1% Save %
£11.77
£11.77 - £11.77
£11.77
£11.61
£11.61 - £11.61
£11.61

James Gaskets O-ring for Oil Line Fitting – Oil Line: 2000–2017 Softail; Oil Pump:…

Only 3 left!

James Gaskets O-ring for Oil Line Fitting – Oil Line: 2000–2017 Softail; Oil Pump:… Stock replacement. Used between the motor oil line fitting and ...

View full details
£11.77
£11.77 - £11.77
£11.77
£11.61
£11.61 - £11.61
£11.61
Save 1% Save %
Save 1% Save %
£22.34
£22.34 - £22.34
£22.34
£22.03
£22.03 - £22.03
£22.03

James Gaskets Inner Shift Arm Transmission Spacer Seal – 2006–2017 Dyna (Mid-control Models)…

Only 2 left!

James Gaskets Inner Shift Arm Transmission Spacer Seal – 2006–2017 Dyna (Mid-control Models)… Spacer seal. OEM replacement reference 7078. Fitment ...

View full details
£22.34
£22.34 - £22.34
£22.34
£22.03
£22.03 - £22.03
£22.03
Save 1% Save %
Sold out
£9.64
£9.64 - £9.64
£9.64
£7.61
£7.61 - £7.61
£7.61

Gardner-Westcott 1/16-27 NPT Allen Pipe Plug. Chrome

Out of stock

Gardner-Westcott 1/16-27 NPT Allen Pipe Plug. Chrome Used to plug oil pumps on some models etc. NPT threads are ''self sealing'' since they are sli...

View full details
£9.64
£9.64 - £9.64
£9.64
£7.61
£7.61 - £7.61
£7.61
Sold out
Sold out
£23.27
£23.27 - £23.27
£23.27
£19.47
£19.47 - £19.47
£19.47

Gardner-Westcott 1/2 NPT Allen Pipe Plug. Chrome

Out of stock

Gardner-Westcott 1/2 NPT Allen Pipe Plug. Chrome NPT threads are ''self sealing'' since they are slightly tapered; the diameter slowly becomes bigg...

View full details
£23.27
£23.27 - £23.27
£23.27
£19.47
£19.47 - £19.47
£19.47
Sold out
Save 16% Save %
£16.07
£16.07 - £16.07
£16.07
£13.45
£13.45 - £13.45
£13.45

Gardner-Westcott 3/8-18 NPT Allen Pipe Plug. Chrome – Oil Pan Front: 1999–2017 Dyna; 1999–2016…

Only 1 left!

Gardner-Westcott 3/8-18 NPT Allen Pipe Plug. Chrome – Oil Pan Front: 1999–2017 Dyna; 1999–2016… Used on transmission oil pan front side. OEM replac...

View full details
£16.07
£16.07 - £16.07
£16.07
£13.45
£13.45 - £13.45
£13.45
Save 16% Save %
Save 2% Save %
£12.27
£12.27 - £12.27
£12.27
£12.00
£12.00 - £12.00
£12.00

Colony Oil Pump Fitting Repair Nipple – H-D Models with Cast Iron Oil Pumps

Only 2 left!

Colony Oil Pump Fitting Repair Nipple – H-D Models with Cast Iron Oil Pumps Stock cast iron oil pumps had cast-on one-piece threaded oil line fitti...

View full details
£12.27
£12.27 - £12.27
£12.27
£12.00
£12.00 - £12.00
£12.00
Save 2% Save %
Save 2% Save %
£31.99
£31.99 - £31.99
£31.99
£31.31
£31.31 - £31.31
£31.31

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 Zinc plated. OEM reproduction. For rocker oil feed line. Kit incl...

View full details
£31.99
£31.99 - £31.99
£31.99
£31.31
£31.31 - £31.31
£31.31
Save 2% Save %
Save 1% Save %
£43.68
£43.68 - £43.68
£43.68
£43.15
£43.15 - £43.15
£43.15

Colony 45" Cyl Head Nut Kit – 1942–1950 45" SV WITH CAST IRON HEADS

Only 2 left!

Colony 45" Cyl Head Nut Kit – 1942–1950 45" SV WITH CAST IRON HEADS Zinc; 45" with cast iron heads Fitment 42-50 45" SV (NU) WITH CAST IRON HEADS P...

View full details
£43.68
£43.68 - £43.68
£43.68
£43.15
£43.15 - £43.15
£43.15
Save 1% Save %
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. Zinc – 1955–1965 Big Twin

Only 3 left!

Colony Linkert Air Cleaner Mount Screw & Lock Kit. Zinc – 1955–1965 Big Twin Zinc plated. OEM reproduction hardware for mounting the air cleane...

View full details
£18.46
£18.46 - £18.46
£18.46
£18.06
£18.06 - £18.06
£18.06
Save 2% Save %
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. Zinc – 1936–1954 Big Twin

Only 3 left!

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

View full details
£18.46
£18.46 - £18.46
£18.46
£18.06
£18.06 - £18.06
£18.06
Save 2% Save %
Sold out
£11.73 - £11.73
£11.73
£13.51
£13.51 - £13.51
£13.51

Colony Cam Cover Oil Passage Bolt. Zinc – 1963–1969 Big Twin

Out of stock

Colony Cam Cover Oil Passage Bolt. Zinc – 1963–1969 Big Twin Zinc plated. Compatible with OEM cam covers. Fitment 63-69 Big Twin (NU) Product Detai...

View full details
£11.73 - £11.73
£11.73
£13.51
£13.51 - £13.51
£13.51
Sold out
Save 2% Save %
£12.72
£12.72 - £12.72
£12.72
£12.44
£12.44 - £12.44
£12.44

Colony Oil Tank Mount Kit. Zinc Plated – 1937–1952 All 45" Solo and 1937–1973 45"…

Only 3 left!

Colony Oil Tank Mount Kit. Zinc Plated – 1937–1952 All 45" Solo and 1937–1973 45"… Reproduction of the original hardware used to mount the oil tank...

View full details
£12.72
£12.72 - £12.72
£12.72
£12.44
£12.44 - £12.44
£12.44
Save 2% Save %
Save 2% Save %
£18.98
£18.98 - £18.98
£18.98
£18.57
£18.57 - £18.57
£18.57

Colony. 37-75 Gas Tank Mount Kit. Zinc – 1937–1975 Big Twin; 1971–1972 FX

Only 2 left!

Colony. 37-75 Gas Tank Mount Kit. Zinc – 1937–1975 Big Twin; 1971–1972 FX Zinc plated finish. Exact reproduction of the hardware used to mount the ...

View full details
£18.98
£18.98 - £18.98
£18.98
£18.57
£18.57 - £18.57
£18.57
Save 2% Save %
Save 1% Save %
£32.36
£32.36 - £32.36
£32.36
£31.96
£31.96 - £31.96
£31.96

Colony Gas Tank Mount Kit. Zinc Plated. Oversize – 1918-1936 All H-D; 1936-73 45" Flathead…

Only 2 left!

Colony Gas Tank Mount Kit. Zinc Plated. Oversize – 1918-1936 All H-D; 1936-73 45" Flathead… Oversize. Reproduction of the original hardware used to...

View full details
£32.36
£32.36 - £32.36
£32.36
£31.96
£31.96 - £31.96
£31.96
Save 1% Save %
Save 1% Save %
£32.36
£32.36 - £32.36
£32.36
£31.96
£31.96 - £31.96
£31.96

Colony Gas Tank Mount Kit. Zinc Plated – 1918-1936 All H-D; 1936-73 45" Flathead…

Only 2 left!

Colony Gas Tank Mount Kit. Zinc Plated – 1918-1936 All H-D; 1936-73 45" Flathead… Reproduction of the original hardware used to mount the fuel tank...

View full details
£32.36
£32.36 - £32.36
£32.36
£31.96
£31.96 - £31.96
£31.96
Save 1% Save %
Save 2% Save %
£19.11
£19.11 - £19.11
£19.11
£18.70
£18.70 - £18.70
£18.70

Colony Knuckle Rocker Box Oil Feed Fitting. Zinc – 1942–1947 Knucklehead

Only 2 left!

Colony Knuckle Rocker Box Oil Feed Fitting. Zinc – 1942–1947 Knucklehead Zinc plated. Accurate reproduction of the special threaded nipple used on ...

View full details
£19.11
£19.11 - £19.11
£19.11
£18.70
£18.70 - £18.70
£18.70
Save 2% Save %
Save 2% Save %
£13.72
£13.72 - £13.72
£13.72
£13.42
£13.42 - £13.42
£13.42

Colony Oil Line Fitting Set. Zinc – 1936-1964 OHV & Flathead Big Twin: Oil…

Only 2 left!

Colony Oil Line Fitting Set. Zinc – 1936-1964 OHV & Flathead Big Twin: Oil… Reproduction of the early style oil line / oil nipples and vent lin...

View full details
£13.72
£13.72 - £13.72
£13.72
£13.42
£13.42 - £13.42
£13.42
Save 2% Save %
Sold out
£16.17
£16.17 - £16.17
£16.17
£15.82
£15.82 - £15.82
£15.82

Colony Oil Line Nipple Cap Set. Zinc – 1915-1964 H-D with OEM Steel Oil Lines

Out of stock

Colony Oil Line Nipple Cap Set. Zinc – 1915-1964 H-D with OEM Steel Oil Lines Reproductions of the original caps. Used to install on the oil line f...

View full details
£16.17
£16.17 - £16.17
£16.17
£15.82
£15.82 - £15.82
£15.82
Sold out
Save 8% Save %
£9.45
£9.45 - £9.45
£9.45
£8.69
£8.69 - £8.69
£8.69

Colony Knuckle Rocker Box Oil Feed Fitting. Zinc – 1936–1941 Knucklehead; 1937–1964 45"…

Only 2 left!

Colony Knuckle Rocker Box Oil Feed Fitting. Zinc – 1936–1941 Knucklehead; 1937–1964 45"… Zinc plated. Accurate reproduction of the special threaded...

View full details
£9.45
£9.45 - £9.45
£9.45
£8.69
£8.69 - £8.69
£8.69
Save 8% 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