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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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£664.62
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£655.38
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£655.38

Cobra Speedster 909 Exhaust. Chrome – 2007–2013 Sportster

Only 2 left!

Cobra Speedster 909 Exhaust. Chrome – 2007–2013 Sportster Chrome. The perfect blend of performance; sound; style and price. Like all Speedsters; th...

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£664.62
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£664.62
£655.38
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£655.38
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£1,392.92
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£1,373.55
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£1,373.55

Cobra Bad Hombre Duals Exhaust – 2012–2017 Softail

Only 2 left!

Cobra Bad Hombre Duals Exhaust – 2012–2017 Softail Chrome. The classic stretched lowrider look while improving performance. Comes with stock diamet...

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£1,392.92
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£1,392.92
£1,373.55
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£1,373.55
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£699.37
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£699.37
£689.64
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£689.64

Cobra Speedster 909 Exhaust. Chrome – 2012–2017 Dyna

Out of stock

Cobra Speedster 909 Exhaust. Chrome – 2012–2017 Dyna Chrome. The perfect blend of performance; sound; style and price. Like all Speedsters; the 909...

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£699.37
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£699.37
£689.64
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£689.64
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£1,091.86
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£1,091.86
£1,076.68
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£1,076.68

Cobra Speedster Short Swept Exhaust. Chrome – 2013–2017 Softail FXSB Breakout

Out of stock

Cobra Speedster Short Swept Exhaust. Chrome – 2013–2017 Softail FXSB Breakout Chrome. A shorter version of its long brother; the Speedster Swept. D...

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£1,091.86
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£1,091.86
£1,076.68
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£1,076.68
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£881.01
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£881.01
£868.75
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£868.75

Cobra Independant Dual Head Pipes with Power Port – 2017–2026 Touring. Requires Disabling…

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Cobra Independant Dual Head Pipes with Power Port – 2017–2026 Touring. Requires Disabling… Chrome with full length 2-1/2" diameter heat shields. Th...

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£881.01
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£881.01
£868.75
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£600.92
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£592.57
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Cobra NH Series 4" Slip-on Mufflers – 1995–2016 FLT/Touring

Out of stock

Cobra NH Series 4" Slip-on Mufflers – 1995–2016 FLT/Touring Black. Comes with a 4" diameter body that bells out to 4.5". These are perforated core ...

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£600.92
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£592.57
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£1,024.72
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£1,024.72
£1,010.47
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£1,010.47

Cobra Powrflo 4-1/2" Slip on Mufflers. Black – 1995–2016 FLT/Touring

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Cobra Powrflo 4-1/2" Slip on Mufflers. Black – 1995–2016 FLT/Touring Satin black. A 4" muffler diameter which slowly tapers to 4 1/2" diameter at t...

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£1,024.72
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£1,024.72
£1,010.47
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£1,010.47
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£31.80
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£31.80
£29.27
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£29.27

Gardner-Westcott Motor Mount Set – 1982–1985 XL Sportster

Only 2 left!

Gardner-Westcott Motor Mount Set – 1982–1985 XL Sportster Chrome; rear allen screws Fitment 82-85 XL Sportster (NU) Product Details Brand: Gardne...

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£31.80
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£31.80
£29.27
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£29.27
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£66.71
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£66.71
£63.52
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£63.52

Gardner-Westcott Head Bolts Stock Style Hex – L1973–1985 XL Sportster

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Gardner-Westcott Head Bolts Stock Style Hex – L1973–1985 XL Sportster Chrome; OEM style hex with washers Fitment L73-85 XL Sportster (NU) Product D...

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£66.71
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£66.71
£63.52
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£63.52
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£160.37
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£160.37
£158.14
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£158.14

Gardner-Westcott Motor Mount Kit – 1986–2003 XL Sportster

Out of stock

Gardner-Westcott Motor Mount Kit – 1986–2003 XL Sportster Chrome; Top; front & rear acorn nut kit Fitment 86-03 XL Sportster (NU) Product Detai...

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£160.37
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£160.37
£158.14
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£158.14
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£41.52
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£41.52
£38.21
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£38.21

Gardner-Westcott Motor Mount Kit – 1991–2003 XL Sportster

Out of stock

Gardner-Westcott Motor Mount Kit – 1991–2003 XL Sportster Chrome; rear motor mount allen head kit Fitment 91-03 XL Sportster (NU) Product Details ...

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£41.52
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£41.52
£38.21
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£38.21
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£73.30
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£73.30
£69.79
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£69.79

Gardner-Westcott Head Bolts, Allenheads – 1957–1972 XL Sportster

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Gardner-Westcott Head Bolts, Allenheads – 1957–1972 XL Sportster Chrome; 900cc models; incl. washers Fitment 57-72 XL Sportster (NU) Product Detail...

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£73.30
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£73.30
£69.79
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£34.52
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£34.52
£31.77
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£31.77

Gardner-Westcott Tappet Block Mount Kit, Allen – 2004–2005 XL Sportster

Out of stock

Gardner-Westcott Tappet Block Mount Kit, Allen – 2004–2005 XL Sportster Chrome Fitment 04-05 XL Sportster (NU) Product Details Brand: Gardner-Wes...

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£34.52
£34.52 - £34.52
£34.52
£31.77
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£31.77
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£31.10
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£31.10
£28.62
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£28.62

Gardner-Westcott Oil Scavenger Pump Screw Kit – 45Ci Flathead

Only 2 left!

Gardner-Westcott Oil Scavenger Pump Screw Kit – 45Ci Flathead Chrome; allen heads Fitment 45ci Flathead Product Details Brand: Gardner-Westcott ...

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£31.10
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£31.10
£28.62
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£28.62
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£49.62
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£49.62
£45.67
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£45.67

Gardner-Westcott Rocker Box Screw Set – 1966–1981 Shovelhead

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Gardner-Westcott Rocker Box Screw Set – 1966–1981 Shovelhead Chrome; hex; requires drilling 3/8 diameter hole Fitment 66-81 Shovelhead (NU) Product...

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£49.62
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£49.62
£45.67
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£45.67
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£66.18
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£66.18
£63.01
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£63.01

Gardner-Westcott Rocker Box Top Bolt Kit. Allen, Polished Chrome – 1984–1999 Big Twin; 1986–2022 XL…

Out of stock

Gardner-Westcott Rocker Box Top Bolt Kit. Allen, Polished Chrome – 1984–1999 Big Twin; 1986–2022 XL… Polished chrome plated allenhead (socket head)...

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£66.18
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£66.18
£63.01
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£63.01
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£124.54
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£124.54
£122.81
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£122.81

Gardner-Westcott Motor Mount Kit – 2007–2017 Softail

Out of stock

Gardner-Westcott Motor Mount Kit – 2007–2017 Softail Top; front and rear post with spacers Fitment 07-17 Softail (NU) Product Details Brand: Gard...

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£124.54
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£124.54
£122.81
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£122.81
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£40.14
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£40.14
£36.94
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£36.94

Gardner-Westcott Oil Pump Mount Set – 1991–1997 XL Sportster

Only 2 left!

Gardner-Westcott Oil Pump Mount Set – 1991–1997 XL Sportster Acorn nut set Fitment 91-97 XL Sportster (NU) Product Details Brand: Gardner-Westcot...

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£40.14
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£40.14
£36.94
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£36.94
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£33.41
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£33.41
£30.74
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£30.74

Gardner-Westcott Motor Mount Set – 1979–1981 XL Sportster

Out of stock

Gardner-Westcott Motor Mount Set – 1979–1981 XL Sportster Chrome; rear allen screws Fitment 79-81 XL Sportster (NU) Product Details Brand: Gardne...

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£33.41
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£33.41
£30.74
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£30.74
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£22.40
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£22.40
£19.95
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£19.95

Gardner-Westcott Tappet Block Mount Kit. Slotted Tapered. Chrome – 30-E76 Big Twin

Out of stock

Gardner-Westcott Tappet Block Mount Kit. Slotted Tapered. Chrome – 30-E76 Big Twin OEM style replacement tapered slotted screws. 1/4"-24 threaded. ...

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£22.40
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£22.40
£19.95
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£19.95
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£690.74
£696.04
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£696.04

Paughco Tapered Exhaust (38"). Chrome – 1991–2011 Dyna

Out of stock

Paughco Tapered Exhaust (38"). Chrome – 1991–2011 Dyna With O2 sensor bungs. Incl. O2 sensor plug set. Order 902811 & 902812 bracket separately...

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£690.74 - £690.74
£690.74
£696.04
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£696.04
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£5.60
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£5.60
£4.98
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£4.98

MCS Float for CV Carburetor – 1992–2006 Big Twin; 1992–2006 XL…

Only 3 left!

MCS Float for CV Carburetor – 1992–2006 Big Twin; 1992–2006 XL… Replacement float valve for the Keihin Constant Vacuum carburetor. OEM replacement ...

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£5.60
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£5.60
£4.98
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£4.98
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£25.24
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£24.87
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£24.87

MCS Spring, Check Ball Oil Filter Sportster – 1991–2022 XL Sportster; 2008–2012 XR1200

Only 2 left!

MCS Spring, Check Ball Oil Filter Sportster – 1991–2022 XL Sportster; 2008–2012 XR1200 Compression spring. 1 used behind the check ball that is pla...

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£25.24
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£25.24
£24.87
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£51.78
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£44.23
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£44.23

MCS Isolator Motor Mount Rubber. Front – 2009–2016 FLT/Touring

Only 3 left!

MCS Isolator Motor Mount Rubber. Front – 2009–2016 FLT/Touring 2 used. OEM style reproduction engine isolator rubber; engine mount rubber or anti-v...

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£51.78
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£51.78
£44.23
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£44.23
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