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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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James Gasket Carburettor Insulator Block Kit Save 11% Save %
£33.40
£33.40 - £33.40
£33.40
£29.71
£29.71 - £29.71
£29.71

James Gasket Carburettor Insulator Block Kit

in stock

Designed to reduce the risk of boiling fuel in the carb

£33.40
£33.40 - £33.40
£33.40
£29.71
£29.71 - £29.71
£29.71
Save 11% Save %
Genuine James Gasket Kit Cylinder Base Metal Base, Silicone, .022 Inch Final Crush .020 Inch For 1937-1947 Knuckle, 74/80 Inch SV Models Save 11% Save %
£49.26
£49.26 - £49.26
£49.26
£43.83
£43.83 - £43.83
£43.83

Genuine James Gasket Kit Cylinder Base Metal Base, Silicone, .022 Inch Final Crush .020 Inch For 1937-1947 Knuckle, 74/80 Inch SV Models #16774-21-X

in stock

Made in the U.S.A.Part NumbersItem Number: 20111213Vendor Part Number: 16774-21-XBarcode Number: 1677421X

£49.26
£49.26 - £49.26
£49.26
£43.83
£43.83 - £43.83
£43.83
Save 11% Save %
James Motor Gasket Kit for Sportster 91-03 XL 883-1200: 0.045 Inches Head Gaskets Save 11% Save %
£224.69
£224.69 - £224.69
£224.69
£199.87
£199.87 - £199.87
£199.87

James Motor Gasket Kit for Sportster 91-03 XL 883-1200: 0.045 Inches Head Gaskets #JGI-17026-91

in stock

DescriptionComplete Gasket KitTop-quality gaskets, oil seals, and o-rings necessary to rebuild an XL/XG engineMade in the USAKit Includes: • 0.045"...

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£224.69
£224.69 - £224.69
£224.69
£199.87
£199.87 - £199.87
£199.87
Save 11% Save %
S&S Cycle Compression Release Hole Plug Save 8% Save %
£25.94
£25.94 - £25.94
£25.94
£23.77
£23.77 - £23.77
£23.77

S&S Cycle Compression Release Hole Plug #90-4916

in stock

DescriptionCompression Release Hole PlugNot for use on OEM headsMade in the U.S.A.SpecificationsColour/Finish : AluminiumRiding Style : StreetProdu...

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£25.94
£25.94 - £25.94
£25.94
£23.77
£23.77 - £23.77
£23.77
Save 8% Save %
S&S Cycle Electric Compression Release Kit
Save 8% Save %
£497.43
£497.43 - £497.43
£497.43
£455.53
£455.53 - £455.53
£455.53

S&S Cycle Electric Compression Release Kit #90-4915

in stock

DescriptionCompression Release KitElectric compression releases open when you press the start button and close when the button is releasedManual co...

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£497.43
£497.43 - £497.43
£497.43
£455.53
£455.53 - £455.53
£455.53
Save 8% Save %
S&S Cycle Stainless Steel Replacement Exhaust Valve for Various Various Harley-Davidson Motorcycles (See Fitment List)
Save 8% Save %
£88.23
£88.23 - £88.23
£88.23
£80.79
£80.79 - £80.79
£80.79

S&S Cycle Stainless Steel Replacement Exhaust Valve for Various Various Harley-Davidson Motorcycles (See Fitment List) #90-2026

Only 3 left!

DescriptionReplacement Stainless Steel Valves for S&S HeadsHeads are also found on S&S Twin Cam-style motors and use 1.940" intake valves a...

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£88.23
£88.23 - £88.23
£88.23
£80.79
£80.79 - £80.79
£80.79
Save 8% Save %
S&S Cycle Stainless Steel Replacement Intake Valve For 79cc S&S Super Stock cylinder heads
Save 8% Save %
£84.19
£84.19 - £84.19
£84.19
£77.13
£77.13 - £77.13
£77.13

S&S Cycle Stainless Steel Replacement Intake Valve For 79cc S&S Super Stock cylinder heads #90-2025

in stock

DescriptionReplacement Stainless Steel Valves for S&S HeadsHeads are also found on S&S Twin Cam-style motors and use 1.940" intake valves a...

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£84.19
£84.19 - £84.19
£84.19
£77.13
£77.13 - £77.13
£77.13
Save 8% Save %
S&S Cycle Stainless Steel Replacement Exhaust Valve for Various Various Harley-Davidson Motorcycles (See Fitment List)
Save 8% Save %
£90.81
£90.81 - £90.81
£90.81
£83.17
£83.17 - £83.17
£83.17

S&S Cycle Stainless Steel Replacement Exhaust Valve for Various Various Harley-Davidson Motorcycles (See Fitment List) #90-2001

in stock

DescriptionReplacement Stainless Steel Valves for S&S HeadsHeads are found on S&S Twin Cam-style motors and use 2.000" intake valves and 1....

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£90.81
£90.81 - £90.81
£90.81
£83.17
£83.17 - £83.17
£83.17
Save 8% Save %
S&S Cycle Stainless Steel Replacement Intake Valve
Save 8% Save %
£45.38
£45.38 - £45.38
£45.38
£41.56
£41.56 - £41.56
£41.56

S&S Cycle Stainless Steel Replacement Intake Valve #90-2000

in stock

DescriptionReplacement Stainless Steel Valves for S&S HeadsHeads are found on S&S Twin Cam-style motors and use 2.000" intake valves and 1....

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£45.38
£45.38 - £45.38
£45.38
£41.56
£41.56 - £41.56
£41.56
Save 8% Save %
S&S Cycle 585G Gear Drive Camshaft Kit for Various Various Harley-Davidson Motorcycles (See Fitment List)
Save 8% Save %
£1,107.29
£1,107.29 - £1,107.29
£1,107.29
£1,014.03
£1,014.03 - £1,014.03
£1,014.03

S&S Cycle 585G Gear Drive Camshaft Kit for Various Various Harley-Davidson Motorcycles (See Fitment List) #33-5179

in stock

Description585G Gear Drive Camshaft KitDesigned for 88/96/103/110 cubic-inch engines with compression ratios from 10.0:1 to 10.5:1Reverses the rear...

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£1,107.29
£1,107.29 - £1,107.29
£1,107.29
£1,014.03
£1,014.03 - £1,014.03
£1,014.03
Save 8% Save %
S&S Cycle 570G Gear Drive Camshaft Kit for Various Various Harley-Davidson Motorcycles (See Fitment List)
Save 8% Save %
£1,107.29
£1,107.29 - £1,107.29
£1,107.29
£1,014.03
£1,014.03 - £1,014.03
£1,014.03

S&S Cycle 570G Gear Drive Camshaft Kit for Various Various Harley-Davidson Motorcycles (See Fitment List) #33-5178

Only 4 left!

Description570G Camshaft KitDesigned for 88" to 103" CID engines with compression ratios between 9:1 and 10:1Strongest from 3200-3700 rpmIncreases ...

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£1,107.29
£1,107.29 - £1,107.29
£1,107.29
£1,014.03
£1,014.03 - £1,014.03
£1,014.03
Save 8% Save %
S&S Cycle 510G Gear Drive Camshaft Kit for Various Various Harley-Davidson Motorcycles (See Fitment List)
Sold out
£1,063.61
£1,063.61 - £1,063.61
£1,063.61
£974.42
£974.42 - £974.42
£974.42

S&S Cycle 510G Gear Drive Camshaft Kit for Various Various Harley-Davidson Motorcycles (See Fitment List) #33-5177

Out of stock

Description510G Camshaft KitCams designed as bolt-in cam for 88", 95", 96" and 103" engines with compression ratios below 9.7:1Kit includes camshaf...

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£1,063.61
£1,063.61 - £1,063.61
£1,063.61
£974.42
£974.42 - £974.42
£974.42
Sold out
S&S Cycle 106 in. Piston Rings for Various Various Harley-Davidson Motorcycles (See Fitment List)
Save 8% Save %
£88.23
£88.23 - £88.23
£88.23
£80.79
£80.79 - £80.79
£80.79

S&S Cycle 106 in. Piston Rings for Various Various Harley-Davidson Motorcycles (See Fitment List) #94-1295X

in stock

DescriptionReplacement Ring Set for S&S PistonsReplacement ring sets for S&S pistons onlyRings come as sets for two pistonsMade in the USAS...

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£88.23
£88.23 - £88.23
£88.23
£80.79
£80.79 - £80.79
£80.79
Save 8% Save %
S&S Cycle 3 7/8 in. Bore Stroker Piston Kit (.010") for Various Various Harley-Davidson Motorcycles (See Fitment List)
Sold out
£655.88
£655.88 - £655.88
£655.88
£600.64
£600.64 - £600.64
£600.64

S&S Cycle 3 7/8 in. Bore Stroker Piston Kit (.010") for Various Various Harley-Davidson Motorcycles (See Fitment List) #92-1211

Out of stock

DescriptionPiston Kit 106" StrokerRequired for S&S 106" stock bore stroker kit with 4-1/2" stroke flywheelsCompatible with stock or S&S Sup...

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£655.88
£655.88 - £655.88
£655.88
£600.64
£600.64 - £600.64
£600.64
Sold out
Vance & Hines Eliminator 400 Quiet Baffle Kit For 2017-2021 Touring Models With 4 Inch Eliminator 400 Slip-On Mufflers
Save 3% Save %
£119.19
£119.19 - £119.19
£119.19
£115.60
£115.60 - £115.60
£115.60

Vance & Hines Eliminator 400 Quiet Baffle Kit For 2017-2021 Touring Models With 4 Inch Eliminator 400 Slip-On Mufflers #23701

in stock

Included mounting hardwarePart NumbersItem Number: 18611604Vendor Part Number: 23701Barcode Number: 1861-1604

£119.19
£119.19 - £119.19
£119.19
£115.60
£115.60 - £115.60
£115.60
Save 3% Save %
Vance & Hines Torquer 450 Quiet Baffle Kit in Black For Harley-Davidson 2017-2023 Touring Models Equipped With Vance & Hines Torquer 450 Slip-Ons
Save 3% Save %
£173.11
£173.11 - £173.11
£173.11
£168.77
£168.77 - £168.77
£168.77

Vance & Hines Torquer 450 Quiet Baffle Kit in Black For Harley-Davidson 2017-2023 Touring Models Equipped With Vance & Hines Torquer 450 Slip-Ons #23709

in stock

DescriptionQuiet BafflesThese baffles will reduce the sound approximately 2-3 decibels from the standard baffles, and offer a deeper rumbleIncludes...

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£173.11
£173.11 - £173.11
£173.11
£168.77
£168.77 - £168.77
£168.77
Save 3% Save %
Vance & Hines Quiet Baffle For V&H Torquer 450 Slip On Mufflers
Save 5% Save %
£95.60
£95.60 - £95.60
£95.60
£90.58
£90.58 - £90.58
£90.58

Vance & Hines Quiet Baffle For V&H Torquer 450 Slip On Mufflers

Only 1 left!

FitmentHarley-Davidson FLHR 1340 Road King - ALL : 1995 - 1998Harley-Davidson FLHR 1450 Road King - ALL : 2000 - 2003Harley-Davidson FLHR 1450 Road...

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£95.60
£95.60 - £95.60
£95.60
£90.58
£90.58 - £90.58
£90.58
Save 5% Save %
S&S Cycle DB Reducer Stainless Steel
Save 8% Save %
£24.55
£24.55 - £24.55
£24.55
£22.49
£22.49 - £22.49
£22.49

S&S Cycle DB Reducer Stainless Steel #551-0063

in stock

DescriptionDB ReducerS&S REPLACEMENT PARTSDB ReducerSAE J2825 dB Reducer, stainless for 4" Grand National Sample Image - please check the part...

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£24.55
£24.55 - £24.55
£24.55
£22.49
£22.49 - £22.49
£22.49
Save 8% Save %
Baffle Stainless Steel
£166.32 - £166.32
£166.32
£171.77
£171.77 - £171.77
£171.77

Baffle Stainless Steel #100-0185

in stock

DescriptionBaffleRinehart 2.5 in. High Performance BafflesHigh performance baffles for 2017-Later Milwaukee-8 Harley-Davidson Touring models equipp...

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£166.32 - £166.32
£166.32
£171.77
£171.77 - £171.77
£171.77
S&S Cycle Black Shadow Muffler Kit for 1995-2008 Harley-Davidson Touring Models Black| Ceramic-Coated
Save 8% Save %
£672.14
£672.14 - £672.14
£672.14
£615.78
£615.78 - £615.78
£615.78

S&S Cycle Black Shadow Muffler Kit for 1995-2008 Harley-Davidson Touring Models Black| Ceramic-Coated #550-0830

in stock

DescriptionShadow Muffler KitFills left side cutout in extended bags when running a Sidewinder 2-into-1Matching end cap for left side is a mirror i...

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£672.14
£672.14 - £672.14
£672.14
£615.78
£615.78 - £615.78
£615.78
Save 8% Save %
S&S Cycle Black Shadow Muffler Kit for 1995-2008 Harley-Davidson Touring Models Black| Ceramic-Coated
Save 8% Save %
£508.25
£508.25 - £508.25
£508.25
£465.44
£465.44 - £465.44
£465.44

S&S Cycle Black Shadow Muffler Kit for 1995-2008 Harley-Davidson Touring Models Black| Ceramic-Coated #550-0831

in stock

DescriptionShadow Muffler KitFills left side cutout in extended bags when running a Sidewinder 2-into-1Matching end cap for left side is a mirror i...

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£508.25
£508.25 - £508.25
£508.25
£465.44
£465.44 - £465.44
£465.44
Save 8% Save %
S&S Cycle Chrome Shadow Muffler Kit for 1995-2008 Harley-Davidson Touring Models
Sold out
£558.44
£558.44 - £558.44
£558.44
£511.59
£511.59 - £511.59
£511.59

S&S Cycle Chrome Shadow Muffler Kit for 1995-2008 Harley-Davidson Touring Models #550-0829

Out of stock

DescriptionShadow Muffler KitFills left side cutout in extended bags when running a Sidewinder 2-into-1Matching end cap for left side is a mirror i...

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£558.44
£558.44 - £558.44
£558.44
£511.59
£511.59 - £511.59
£511.59
Sold out
End Caps MotoPro 45
£290.67 - £290.67
£290.67
£302.46
£302.46 - £302.46
£302.46

End Caps MotoPro 45 #900-0155

in stock

DescriptionEnd Caps MotoPro 45Moto Series Castle End Caps for Harley-Davidson Touring models4.5” for use with Rinehart Racing MOTOPRO45 4.5” Slip-O...

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£290.67 - £290.67
£290.67
£302.46
£302.46 - £302.46
£302.46
Vance & Hines Saddlebag Support Kit For 2018-2023 FLSB Sport Glide & FLHC/S Heritage Classic Black
£33.96 - £33.96
£33.96
£35.49
£35.49 - £35.49
£35.49

Vance & Hines Saddlebag Support Kit For 2018-2023 FLSB Sport Glide & FLHC/S Heritage Classic Black #21946

in stock

DescriptionSaddlebag Support BracketAllows use of OEM bags on 2018 Sport Glide & Heritage Classic Softail when using V&H full exhau...

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£33.96 - £33.96
£33.96
£35.49
£35.49 - £35.49
£35.49

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