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Complete Engines & Performance Kits

Browse complete engines & performance kits for Harley-Davidson, American V-twin and compatible motorcycle applications. Check the product details and stated fitment before ordering.

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S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Granite Highlighted Fins
£3,428.27 - £3,428.27
£3,428.27
£3,428.27 - £3,428.27
£3,428.27

S&S Cycle 128" Power Package - Kit - Black Granite / Highlighted Fins for Harley-Davidson Touring & Trike 2017-2025

In stock

Description128" Power Package 114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kit Bolt-in kit, case maching not required Forged pisto...

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£3,428.27 - £3,428.27
£3,428.27
£3,428.27 - £3,428.27
£3,428.27
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Non-Highlighted Fins Big Bore
£3,639.48 - £3,639.48
£3,639.48
£3,639.48 - £3,639.48
£3,639.48

S&S Cycle 124" Power Package - Big Bore, Kit - Black / Non-Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2017-2025

Low stock

Description124" Power Package Bolt-on kit With updated fins No case machining required Forged pistons Made in the USA Includes oil pump/cam plate, ...

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£3,639.48 - £3,639.48
£3,639.48
£3,639.48 - £3,639.48
£3,639.48
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Highlighted Fins Big Bore
£3,639.48 - £3,639.48
£3,639.48
£3,639.48 - £3,639.48
£3,639.48

S&S Cycle 124" Power Package - Big Bore, Kit - Black / Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2017-2025

Low stock

Description124" Power Package Bolt-on kit With updated fins No case machining required Forged pistons Made in the USA Includes oil pump/cam plate, ...

View full details
£3,639.48 - £3,639.48
£3,639.48
£3,639.48 - £3,639.48
£3,639.48
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Granite Highlighted Fins Big Bore
£3,639.48 - £3,639.48
£3,639.48
£3,639.48 - £3,639.48
£3,639.48

S&S Cycle 124" Power Package - Big Bore, Kit - Black Granite / Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2017-2025

Low stock

Description124" Power Package Bolt-on kit With updated fins No case machining required Forged pistons Made in the USA Includes oil pump/cam plate, ...

View full details
£3,639.48 - £3,639.48
£3,639.48
£3,639.48 - £3,639.48
£3,639.48
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Non-Highlighted Fins Big Bore
£3,428.27 - £3,428.27
£3,428.27
£3,428.27 - £3,428.27
£3,428.27

S&S Cycle 124" Power Package - Kit, Big Bore - Black / Non-Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2017-2025

In stock

Description124" Power Package Bolt-on kit With updated fins No case machining required Forged pistons Made in the USA Includes oil pump/cam plate, ...

View full details
£3,428.27 - £3,428.27
£3,428.27
£3,428.27 - £3,428.27
£3,428.27
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Highlighted Fins Wrinkle Black 550C
£3,398.09 - £3,398.09
£3,398.09
£3,398.09 - £3,398.09
£3,398.09

S&S Cycle 124" Power Package - 550C, Kit - Highlighted Fins / Wrinkle Black for Harley-Davidson Touring, Softail, Dyna & Trike 2017-2025

In stock

Description124" Power Package Bolt-on kit Updated fins No case machining required Forged pistons Made in the USA Includes oil pump/cam plate, pushr...

View full details
£3,398.09 - £3,398.09
£3,398.09
£3,398.09 - £3,398.09
£3,398.09
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Granite Highlighted Fins Big Bore
£3,428.27 - £3,428.27
£3,428.27
£3,428.27 - £3,428.27
£3,428.27

S&S Cycle 124" Power Package - Kit, Big Bore - Black Granite / Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2017-2025

Low stock

Description124" Power Package Bolt-on kit With updated fins No case machining required Forged pistons Made in the USA Includes oil pump/cam plate, ...

View full details
£3,428.27 - £3,428.27
£3,428.27
£3,428.27 - £3,428.27
£3,428.27
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Non-Highlighted Fins
Sold out
£3,600.99 - £3,600.99
£3,600.99
£3,600.99 - £3,600.99
£3,600.99

S&S Cycle 128" Power Package - Kit - Black / Non-Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2017-2025

Out of stock

Description128" Power Package 114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kit Bolt-in kit, case maching not required Forged pisto...

View full details
£3,600.99 - £3,600.99
£3,600.99
£3,600.99 - £3,600.99
£3,600.99
Sold out
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Highlighted Fins
Sold out
£3,600.99 - £3,600.99
£3,600.99
£3,600.99 - £3,600.99
£3,600.99

S&S Cycle 128" Power Package - Kit - Black / Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2017-2025

Out of stock

Description128" Power Package 114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kit Bolt-in kit, case maching not required Forged pisto...

View full details
£3,600.99 - £3,600.99
£3,600.99
£3,600.99 - £3,600.99
£3,600.99
Sold out
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Non-Highlighted Fins
£3,398.09 - £3,398.09
£3,398.09
£3,398.09 - £3,398.09
£3,398.09

S&S Cycle 128" Power Package - Kit - Black / Non-Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2017-2025

In stock

Description128" Power Package 114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kit Bolt-in kit, case maching not required Forged pisto...

View full details
£3,398.09 - £3,398.09
£3,398.09
£3,398.09 - £3,398.09
£3,398.09
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Highlighted Fins
£3,398.09 - £3,398.09
£3,398.09
£3,398.09 - £3,398.09
£3,398.09

S&S Cycle 128" Power Package - Kit - Black / Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2017-2025

Low stock

Description128" Power Package 114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kit Bolt-in kit, case maching not required Forged pisto...

View full details
£3,398.09 - £3,398.09
£3,398.09
£3,398.09 - £3,398.09
£3,398.09
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Granite Highlighted Fins
Sold out
£3,398.09 - £3,398.09
£3,398.09
£3,398.09 - £3,398.09
£3,398.09

S&S Cycle 128" Power Package - Kit - Black Granite / Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2017-2025

Out of stock

Description128" Power Package 114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kit Bolt-in kit, case maching not required Forged pisto...

View full details
£3,398.09 - £3,398.09
£3,398.09
£3,398.09 - £3,398.09
£3,398.09
Sold out
S&S Cycle Big Bore Kit for 2019-2021, 2023 ROYAL ENFIELD
£958.13 - £958.13
£958.13
£958.13 - £958.13
£958.13

S&S Cycle Big Bore Kit for 2019-2021, 2023 ROYAL ENFIELD #920-0144

In stock

DescriptionBig Bore KitIncreases bore from stockIncrease compression ratio from 9.5:1 to 11.0:1Kit includes cylinder sleeves, pistons and head gask...

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£958.13 - £958.13
£958.13
£958.13 - £958.13
£958.13
S&S Cycle MK136 Engine with 475G Cam for 2018-2024 Harley-Davidson
£9,418.13 - £9,418.13
£9,418.13
£9,418.13 - £9,418.13
£9,418.13

S&S Cycle Mk136 Black Edition Engine - Each - Black / Powder Coat for Harley-Davidson Softail, Dyna & FXR 2018-2024

In stock

DescriptionMK136 Engine with 475G Cam Black Edition engine with 475G camshaft Made in the USA For oil-cooled. Closed course competition only. Fitme...

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£9,418.13 - £9,418.13
£9,418.13
£9,418.13 - £9,418.13
£9,418.13
S&S Cycle MK136 Engine with 550G Cam for 2018-2024 Harley-Davidson
£9,418.13 - £9,418.13
£9,418.13
£9,418.13 - £9,418.13
£9,418.13

S&S Cycle Mk136 Black Edition Engine - Each - Black / Powder Coat for Harley-Davidson Softail, Dyna & FXR 2018-2024

In stock

DescriptionMK136 Engine with 550G Cam Black Edition engine 550G camshaft for oil cooled Made in the USA Closed course competition use only. Fitment...

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£9,418.13 - £9,418.13
£9,418.13
£9,418.13 - £9,418.13
£9,418.13
S&S Cycle MK136 Black Edition Engine with 550G Cam for 2017-2023 Harley-Davidson Powder Coat Race
£9,044.30 - £9,044.30
£9,044.30
£9,044.30 - £9,044.30
£9,044.30

S&S Cycle Mk136 Black Edition Engine with 550G Cam - Race, Each - Black / Powder Coat for Harley-Davidson Touring & Trike 2017-2023

Low stock

DescriptionMK136 Black Edition Engine with 550G Cam Cylinder Heads: High-flow cylinder heads with premium seats, guides, valves, springs, and seals...

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£9,044.30 - £9,044.30
£9,044.30
£9,044.30 - £9,044.30
£9,044.30
S&S Cycle T124 Low Compression Long Block Engine for 2007-2016 Harley-Davidson T-Series Stone Grey
Sold out
£7,438.87 - £7,438.87
£7,438.87
£7,438.87 - £7,438.87
£7,438.87

S&S Cycle T124 Low Compression Long Block Engine - T-Series, Each - Stone Gray for Harley-Davidson Touring 2007-2016

Out of stock

DescriptionT124 Low Compression Long Block Engine Includes Super Stock™ heads, T2 crankcase, high flow oil pump, cam cover and easy start 585 gear ...

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£7,438.87 - £7,438.87
£7,438.87
£7,438.87 - £7,438.87
£7,438.87
Sold out
S&S Cycle T124 High Compression Long Block Engine for 2007-2016 Harley-Davidson T-Series Stone Grey
Sold out
£7,438.87 - £7,438.87
£7,438.87
£7,438.87 - £7,438.87
£7,438.87

S&S Cycle T124 High Compression Long Block Engine - Each, T-Series - Stone Gray for Harley-Davidson Touring 2007-2016

Out of stock

DescriptionT124 High Compression Long Block Engine High compression Oil line installation kit required No fuel system or ignition systems included ...

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£7,438.87 - £7,438.87
£7,438.87
£7,438.87 - £7,438.87
£7,438.87
Sold out
S&S Cycle V124 Long Block Engine for 1984-1999 Harley-Davidson Chrome Natural
£7,182.72 - £7,182.72
£7,182.72
£7,182.72 - £7,182.72
£7,182.72

S&S Cycle V124 Long Block Engine - Each - Chrome / Natural for Harley-Davidson Touring, Softail, Dyna & FXR 1984-1999

Low stock

DescriptionV124 Long Block Engine For '84-'99 Evolution Big Twin or '70-'99 custom chasis with alternator-style primary Specially machined cylinder...

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£7,182.72 - £7,182.72
£7,182.72
£7,182.72 - £7,182.72
£7,182.72
S&S Cycle V124 Long Block Engine for 1984-1999 Harley-Davidson Chrome Wrinkle Black
£6,923.11 - £6,923.11
£6,923.11
£6,923.11 - £6,923.11
£6,923.11

S&S Cycle V124 Long Block Engine - Each - Chrome / Wrinkle Black for Harley-Davidson Touring, Softail, Dyna & FXR 1984-1999

In stock

DescriptionV124 Long Block Engine For '84-'99 Evolution Big Twin or '70-'99 custom chasis with alternator-style primary Specially machined cylinder...

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£6,923.11 - £6,923.11
£6,923.11
£6,923.11 - £6,923.11
£6,923.11
S&S Cycle V124 Long Block Engine for 1984-1999 Harley-Davidson Black
£7,182.72 - £7,182.72
£7,182.72
£7,182.72 - £7,182.72
£7,182.72

S&S Cycle V124 Long Block Engine - Each - Black for Harley-Davidson Touring, Softail, Dyna & FXR 1984-1999

Low stock

DescriptionV124 Long Block Engine For '84-'99 Evolution Big Twin or '70-'99 custom chasis with alternator-style primary Specially machined cylinder...

View full details
£7,182.72 - £7,182.72
£7,182.72
£7,182.72 - £7,182.72
£7,182.72
S&S Cycle V111 Long-Block Engine for 1984-1999 Harley-Davidson V-Series Natural Long Block
Sold out
£6,923.11 - £6,923.11
£6,923.11
£6,923.11 - £6,923.11
£6,923.11

S&S Cycle V111 Long-block Engine - V-Series, Each - Natural for Harley-Davidson Touring, Softail, Dyna & FXR 1984-1999

Out of stock

DescriptionV111 Long-Block Engine Fits '84-'99 Harley-Davidson® big twin chasis and custom frames designed for Evolution® big twin engines +30% inc...

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£6,923.11 - £6,923.11
£6,923.11
£6,923.11 - £6,923.11
£6,923.11
Sold out
S&S Cycle Big Bore Kit
£789.93 - £789.93
£789.93
£789.93 - £789.93
£789.93

S&S Cycle Big Bore Kit #920-0145

In stock

DescriptionBig Bore KitIncreases bore from stockIncrease compression ratio from 9.5:1 to 11.0:1Kit includes cylinder sleeves, pistons and head gask...

View full details
£789.93 - £789.93
£789.93
£789.93 - £789.93
£789.93
S&S Cycle Power Package - 128" Water Cooled, Gear Drive, Black Granite w/ Highlighted Fins and Chrome Pushrod Tubes for Various Various Harley-Davidson Motorcycles (See Fitment List)
£3,243.44 - £3,243.44
£3,243.44
£3,712.84
£3,712.84 - £3,712.84
£3,712.84

S&S Cycle Power PK GR M8 BKG WTR for Harley-Davidson Touring & Trike 2017-2023

Low stock

Description114" to 128" Big Bore KitFitment 2021-2023 Harley Davidson FLHTCUTG 1868 ABS Tri Glide Ultra 114 2019-2023 Harley Davidson FLHTK 1868 AB...

View full details
£3,243.44 - £3,243.44
£3,243.44
£3,712.84
£3,712.84 - £3,712.84
£3,712.84

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