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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 132" High Compression/ 136" Big Bore Kit for 2019-2025 Harley-Davidson Black Highlighted Fins
£1,826.35 - £1,826.35
£1,826.35
£1,826.35 - £1,826.35
£1,826.35

S&S Cycle 132" High Compression / 136" Big Bore Kit - Black / Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2019-2025

In stock

Description132" High Compression / 136" Big Bore Kit 132" high compression kit will work on 114"/117" motors with 4-1/2" stroke flywheels only To a...

View full details
£1,826.35 - £1,826.35
£1,826.35
£1,826.35 - £1,826.35
£1,826.35
S&S Cycle 132" High Compression/ 136" Big Bore Kit for 2019-2025 Harley-Davidson Black Granite Highlighted Fins
£1,826.35 - £1,826.35
£1,826.35
£1,826.35 - £1,826.35
£1,826.35

S&S Cycle 132" High Compression / 136" Big Bore Kit - Black Granite / Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2019-2025

In stock

Description132" High Compression / 136" Big Bore Kit 132" high compression kit will work on 114"/117" motors with 4-1/2" stroke flywheels only To a...

View full details
£1,826.35 - £1,826.35
£1,826.35
£1,826.35 - £1,826.35
£1,826.35
S&S Cycle 132" High Compression/ 136" Big Bore Kit for 2019-2025 Harley-Davidson Black Non-Highlighted Fins
£1,826.35 - £1,826.35
£1,826.35
£1,826.35 - £1,826.35
£1,826.35

S&S Cycle 132" High Compression / 136" Big Bore Kit - Black / Non-Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2019-2025

In stock

Description132" High Compression / 136" Big Bore Kit 132" high compression kit will work on 114"/117" motors with 4-1/2" stroke flywheels only To a...

View full details
£1,826.35 - £1,826.35
£1,826.35
£1,826.35 - £1,826.35
£1,826.35
S&S Cycle 132" High Compression/ 136" Big Bore Kit for 2019-2025 Harley-Davidson Black Highlighted Fins
£1,826.35 - £1,826.35
£1,826.35
£1,826.35 - £1,826.35
£1,826.35

S&S Cycle 132" High Compression / 136" Big Bore Kit - Black / Highlighted Fins for Harley-Davidson Touring, Softail, Dyna & Trike 2019-2025

Low stock

Description132" High Compression / 136" Big Bore Kit 132" high compression kit will work on 114"/117" motors with 4-1/2" stroke flywheels only To a...

View full details
£1,826.35 - £1,826.35
£1,826.35
£1,826.35 - £1,826.35
£1,826.35
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Highlighted Fins Big Bore
£4,329.56 - £4,329.56
£4,329.56
£4,329.56 - £4,329.56
£4,329.56

S&S Cycle 124" Power Package - Big Bore, Kit - Black / Highlighted Fins for Harley-Davidson Touring & 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
£4,329.56 - £4,329.56
£4,329.56
£4,329.56 - £4,329.56
£4,329.56
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Highlighted Fins Big Bore
£4,078.30 - £4,078.30
£4,078.30
£4,078.30 - £4,078.30
£4,078.30

S&S Cycle 124" Power Package - Big Bore, Kit - Black / Highlighted Fins for Harley-Davidson Touring & 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
£4,078.30 - £4,078.30
£4,078.30
£4,078.30 - £4,078.30
£4,078.30
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Highlighted Fins Big Bore
Sold out
£4,078.30 - £4,078.30
£4,078.30
£4,078.30 - £4,078.30
£4,078.30

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

Out of 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
£4,078.30 - £4,078.30
£4,078.30
£4,078.30 - £4,078.30
£4,078.30
Sold out
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Highlighted Fins
£4,329.56 - £4,329.56
£4,329.56
£4,329.56 - £4,329.56
£4,329.56

S&S Cycle 128" Power Package - Kit - Black / Highlighted Fins for Harley-Davidson Touring & 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
£4,329.56 - £4,329.56
£4,329.56
£4,329.56 - £4,329.56
£4,329.56
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Granite Highlighted Fins
£4,242.93 - £4,242.93
£4,242.93
£4,242.93 - £4,242.93
£4,242.93

S&S Cycle 128" Power Package - Kit - Black Granite / Highlighted Fins for Harley-Davidson Touring & 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
£4,242.93 - £4,242.93
£4,242.93
£4,242.93 - £4,242.93
£4,242.93
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Highlighted Fins
£4,078.30 - £4,078.30
£4,078.30
£4,078.30 - £4,078.30
£4,078.30

S&S Cycle 128" Power Package - Kit - Black / Highlighted Fins for Harley-Davidson Touring & 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
£4,078.30 - £4,078.30
£4,078.30
£4,078.30 - £4,078.30
£4,078.30
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Granite Highlighted Fins
£4,078.30 - £4,078.30
£4,078.30
£4,078.30 - £4,078.30
£4,078.30

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...

View full details
£4,078.30 - £4,078.30
£4,078.30
£4,078.30 - £4,078.30
£4,078.30
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Non-Highlighted Fins Big Bore
£4,329.56 - £4,329.56
£4,329.56
£4,329.56 - £4,329.56
£4,329.56

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, ...

View full details
£4,329.56 - £4,329.56
£4,329.56
£4,329.56 - £4,329.56
£4,329.56
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Highlighted Fins Big Bore
£4,329.56 - £4,329.56
£4,329.56
£4,329.56 - £4,329.56
£4,329.56

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
£4,329.56 - £4,329.56
£4,329.56
£4,329.56 - £4,329.56
£4,329.56
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Granite Highlighted Fins Big Bore
£4,329.56 - £4,329.56
£4,329.56
£4,329.56 - £4,329.56
£4,329.56

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
£4,329.56 - £4,329.56
£4,329.56
£4,329.56 - £4,329.56
£4,329.56
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Non-Highlighted Fins Big Bore
£4,078.30 - £4,078.30
£4,078.30
£4,078.30 - £4,078.30
£4,078.30

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
£4,078.30 - £4,078.30
£4,078.30
£4,078.30 - £4,078.30
£4,078.30
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Highlighted Fins Wrinkle Black 550C
£4,042.40 - £4,042.40
£4,042.40
£4,042.40 - £4,042.40
£4,042.40

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
£4,042.40 - £4,042.40
£4,042.40
£4,042.40 - £4,042.40
£4,042.40
S&S Cycle 124" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Granite Highlighted Fins Big Bore
£4,078.30 - £4,078.30
£4,078.30
£4,078.30 - £4,078.30
£4,078.30

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
£4,078.30 - £4,078.30
£4,078.30
£4,078.30 - £4,078.30
£4,078.30
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Non-Highlighted Fins
Sold out
£4,283.78 - £4,283.78
£4,283.78
£4,283.78 - £4,283.78
£4,283.78

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
£4,283.78 - £4,283.78
£4,283.78
£4,283.78 - £4,283.78
£4,283.78
Sold out
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Highlighted Fins
Sold out
£4,283.78 - £4,283.78
£4,283.78
£4,283.78 - £4,283.78
£4,283.78

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
£4,283.78 - £4,283.78
£4,283.78
£4,283.78 - £4,283.78
£4,283.78
Sold out
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Non-Highlighted Fins
£4,042.40 - £4,042.40
£4,042.40
£4,042.40 - £4,042.40
£4,042.40

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
£4,042.40 - £4,042.40
£4,042.40
£4,042.40 - £4,042.40
£4,042.40
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Highlighted Fins
£4,042.40 - £4,042.40
£4,042.40
£4,042.40 - £4,042.40
£4,042.40

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
£4,042.40 - £4,042.40
£4,042.40
£4,042.40 - £4,042.40
£4,042.40
S&S Cycle 128" Power Package for 2017-2025 Harley-Davidson Performance Kit Black Granite Highlighted Fins
Sold out
£4,042.40 - £4,042.40
£4,042.40
£4,042.40 - £4,042.40
£4,042.40

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
£4,042.40 - £4,042.40
£4,042.40
£4,042.40 - £4,042.40
£4,042.40
Sold out
S&S Cycle Big Bore Kit for 2019-2021, 2023 ROYAL ENFIELD
£1,139.80 - £1,139.80
£1,139.80
£1,139.80 - £1,139.80
£1,139.80

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...

View full details
£1,139.80 - £1,139.80
£1,139.80
£1,139.80 - £1,139.80
£1,139.80
S&S Cycle MK136 Engine with 475G Cam for 2018-2024 Harley-Davidson
£11,203.91 - £11,203.91
£11,203.91
£11,203.91 - £11,203.91
£11,203.91

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...

View full details
£11,203.91 - £11,203.91
£11,203.91
£11,203.91 - £11,203.91
£11,203.91

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