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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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£85.23
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£84.04

Colony Gas Strainer. Nickel – 1932–1938 H-D

Only 2 left!

Colony Gas Strainer. Nickel – 1932–1938 H-D Nickel plated. Exact duplicate of the original gas / fuel strainer as found on the early H-D models. In...

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£85.23
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£85.23
£84.04
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£44.08
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£43.15

Colony Sprocket Shaft Oil Seal. Screw Type, STD – 1955–1968 Big Twin

Only 3 left!

Colony Sprocket Shaft Oil Seal. Screw Type, STD – 1955–1968 Big Twin Standard thread size. Screw type bearing retainer nut. With seal. OEM replacem...

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£44.08
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£44.08
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£30.44
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Colony Exhaust Pipe Nut – 2021–2024 74" H-D; 1925–1929 61"/74" H-D…

Only 2 left!

Colony Exhaust Pipe Nut – 2021–2024 74" H-D; 1925–1929 61"/74" H-D… Nickel plated. Accurately reproduced early OEM hardware. Note: See 989670 for e...

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£29.80
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£29.80
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£7.82 - £7.82
£7.82
£8.46
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£8.46

Colony Head Bolt Washer Set – 1929–1973 45" SV

Out of stock

Colony Head Bolt Washer Set – 1929–1973 45" SV Black parkerized; Fits models with cast iron cylinder heads Fitment 29-73 45" SV (NU) Product Detail...

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£7.82 - £7.82
£7.82
£8.46
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£8.46
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£10.74 - £10.74
£10.74
£11.63
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£11.63

Colony Head Bolt Washer Set – 1936–1984 OHV Big Twin

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Colony Head Bolt Washer Set – 1936–1984 OHV Big Twin Chrome; for 7/16 headbolts Fitment 36-84 OHV Big Twin (NU) Product Details Brand: Colony Ca...

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£10.74
£11.63
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£11.63
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Colony Rocker Cover Washet Set. Chrome – L1954–1965 Panhead

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Colony Rocker Cover Washet Set. Chrome – L1954–1965 Panhead Chrome. Washers as used below the Panhead rocker cover screws. Use as required with lon...

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£15.23
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£8.34
£13.18
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£13.18

Colony Timing/Drain Plug. OEM Style Hex. Parkerized – Timing Plug: 1938–1999 Big Twin…

Only 2 left!

Colony Timing/Drain Plug. OEM Style Hex. Parkerized – Timing Plug: 1938–1999 Big Twin… Black parkerized finish. 5/8"-18 threaded. OEM style replace...

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£8.34
£13.18
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£13.18
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£10.70 - £10.70
£10.70
£11.58
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£11.58

Colony Timing/Drain Plug. OEM Style Hex. Chrome – Timing Plug: 1938–1999 Big Twin…

Out of stock

Colony Timing/Drain Plug. OEM Style Hex. Chrome – Timing Plug: 1938–1999 Big Twin… 5/8"-18 threaded. OEM style replacement for 704 hex head timing ...

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£10.70
£11.58
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£10.95
£11.86
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£11.86

Colony Timing and Oil Drain Plug. 1/2-13. Hex Head – Transmission: 1937–1986 4-Sp FL; FX.…

Only 2 left!

Colony Timing and Oil Drain Plug. 1/2-13. Hex Head – Transmission: 1937–1986 4-Sp FL; FX.… Chrome plated. 1/2-13 threaded. Hex head. Includes brass...

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£13.79
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Colony Timing Plug. OEM Style Allen. Chrome – Timing Plug: 1938–1999 Big Twin…

Only 3 left!

Colony Timing Plug. OEM Style Allen. Chrome – Timing Plug: 1938–1999 Big Twin… 5/8"-18 threaded. Custom replacement for 704 hex head timing & d...

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£11.97
£13.79
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£13.79
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£8.34
£9.03
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£9.03

Colony Timing/Drain Plug. Cap Style. Chrome – Timing Plug: 1938–1999 Big Twin…

Only 2 left!

Colony Timing/Drain Plug. Cap Style. Chrome – Timing Plug: 1938–1999 Big Twin… 5/8"-18 threaded. Custom Cap style replacement for 704 hex head timi...

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£8.34
£9.03
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£15.24
£17.56
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£17.56

Colony Nut Install Tool – 1911-1929 V-TWIN; 1930–1934 SINGLES…

Only 2 left!

Colony Nut Install Tool – 1911-1929 V-TWIN; 1930–1934 SINGLES… Used to install 989244 crankcase nuts. Fitment 1911-1929 V-TWIN; 30-34 SINGLES; 29-3...

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£15.24 - £15.24
£15.24
£17.56
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£17.56
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£10.88
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£10.88
£10.00
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£10.00

Colony Nut. Pinion and Sprocket Shaft – 54-E81 XL Sportster

Only 2 left!

Colony Nut. Pinion and Sprocket Shaft – 54-E81 XL Sportster 11/16-18 X 1/4 X 1 3/16 hex. Used on flywheel side. Repl. 8011. Fitment 54-E81 XL Sport...

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£10.88
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£10.88
£10.00
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£10.00
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£10.88
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£10.88
£10.00
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£10.00

Colony Pinion/Sprocket Shaft Nut – Pinion Shaft: 30-E81 Big Twin. Sprocket…

Only 2 left!

Colony Pinion/Sprocket Shaft Nut – Pinion Shaft: 30-E81 Big Twin. Sprocket… 3/4-18 threaded. Used on flywheel side. Repl. 24023-36. Fitment Pinion ...

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£10.88
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£10.88
£10.00
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£10.00
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£21.83
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£21.83
£21.36
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£21.36

Colony Manifold Inlet Nipple – 1937–1948 74"/80" Flathead

Only 2 left!

Colony Manifold Inlet Nipple – 1937–1948 74"/80" Flathead Exact duplicate threaded steel inlet nipple which screws into the cylinder head. OEM repl...

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£21.83
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£21.83
£21.36
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£21.36
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£97.05
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£97.05
£87.55
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£87.55

Colony Cylinder Stud Set (8-Pack) – 1986–2022 XL Sportster; 2008–2012…

Only 2 left!

Colony Cylinder Stud Set (8-Pack) – 1986–2022 XL Sportster; 2008–2012… Replacement OEM style heat treated alloy steel cylinder studs for Sportster ...

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£97.05
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£97.05
£87.55
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£87.55
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£6.02
£6.51
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£6.51

Colony Early Style – 1941–1948 SV Big Twin; 1941–1954 45" SV

Only 2 left!

Colony Early Style – 1941–1948 SV Big Twin; 1941–1954 45" SV Parkerized; long shoulder nut; 1/4-24 thread Fitment 41-48 SV Big Twin; 41-54 45" SV (...

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£6.02 - £6.02
£6.02
£6.51
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£6.51
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£12.14
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£12.14
£11.16
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£11.16

Colony Oil Screen Crankcase – 1970–1980 Big Twin

Only 2 left!

Colony Oil Screen Crankcase – 1970–1980 Big Twin Chrome; OEM reproduction Fitment 70-80 Big Twin (NU) Product Details Brand: Colony Category: MO...

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£12.14
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£12.14
£11.16
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£11.16
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£9.15
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£9.15
£8.41
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£8.41

Colony Oil Pump Check Valve – 1936–1980 Big Twin OHV & SV; 1937–1952…

Only 2 left!

Colony Oil Pump Check Valve – 1936–1980 Big Twin OHV & SV; 1937–1952… Black parkerized; OEM style reproduction Fitment 36-80 Big Twin OHV &...

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£9.15
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£9.15
£8.41
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£8.41
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£9.15
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£9.15
£8.41
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£8.41

Colony Oil Pump – 1936–1952 Big Twin OHV & Flathead…

Only 2 left!

Colony Oil Pump – 1936–1952 Big Twin OHV & Flathead… Black parkerized. Bypass plug/bypass valve; OEM reproduction. OEM replacement reference 26...

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£9.15
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£9.15
£8.41
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£8.41
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£11.77
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£11.77
£11.52
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£11.52

Colony Hex Plug Oil Screen Crankcase. Chrome – 1952–1965 Big Twin

Only 2 left!

Colony Hex Plug Oil Screen Crankcase. Chrome – 1952–1965 Big Twin Colony, hex plug oil screen crankcase. Chrome Fitment 52-65 Big Twin (NU) Product...

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£11.77
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£11.77
£11.52
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£11.52
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£37.17
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£37.17
£32.07
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£32.07

Gardner-Westcott Cylinder Base Studs – 1972–1985 XL Sportster

Only 3 left!

Gardner-Westcott Cylinder Base Studs – 1972–1985 XL Sportster 3/8-24 to 3/8-16 x 2 11-32 Fitment 72-85 XL Sportster (NU) Product Details Brand: G...

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£37.17
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£37.17
£32.07
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£126.42
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£126.42
£125.54
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£125.54

Killer Custom ''Streamliner'' Cover. For S&S Stealth – S&S Stealth Air Cleaners without Cover

Out of stock

Killer Custom ''Streamliner'' Cover. For S&S Stealth – S&S Stealth Air Cleaners without Cover Black powder coated; with ''Killer Custom'' e...

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£126.42
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£125.54
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£151.29
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£150.24

Killer Custom Flush-mount Fuel Cap Kit. Black – 2018–2026 Softail: 2018–2020 FLDE Deluxe…

Out of stock

Killer Custom Flush-mount Fuel Cap Kit. Black – 2018–2026 Softail: 2018–2020 FLDE Deluxe… Gloss black anodized pop-up aluminum caps. The right one ...

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£151.29
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£150.24
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