Performance Kits

96" Sidewinder® Engine Performance Kit — 3.625" bore, 4.625" stroke, 9.75:1 compression

Reduced price

S&S CYCLE 96" Sidewinder® Engine Performance Kit — 3.625" bore, 4.625"...

Complete S&S Sidewinder® performance kit with flywheel assembly, stroker big bore cylinder, pistons, rings and gaskets. Made in USA. Some installation parts and machine work required.

€2,117.08 ~~€2,661.47~~

Reduced price

S&S CYCLE Hooligan Engine Performance Kit — 1200 cc, Wrinkle Black

Bolt-on performance kit with bolt-in cams and premium tappets. Easy installation with no machining or rebalancing. Uses stock heads, pushrods, and fuel system.

€1,429.30 ~~€1,796.74~~

110" Power Package Performance Kit — 4" bore, 10.5:1 compression, Black

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S&S CYCLE 110" Power Package Performance Kit — 4" bore, 10.5:1...

Complete S&S 110" big-bore performance kit with 4" cylinders, 10.5:1 pistons and 585 cams; fits stock heads.

€2,788.77 ~~€3,505.89~~

124" Power Package for Water Cooled 107" M8 — 4.250" bore, water-cooled, Wrinkle Black

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S&S CYCLE 124" Power Package for Water Cooled 107" M8 — 4.250" bore,...

Complete bolt-on big bore kit with forged pistons, billet-machined components, S&S cam and tappets. No case machining required.

€2,436.38 ~~€3,062.87~~

124" Power Package for Oil Cooled 107" M8 — 4.250" bore, 11:1 compression

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S&S CYCLE 124" Power Package for Oil Cooled 107" M8 — 4.250" bore, 11:1...

Complete bolt-on big-bore upgrade kit with precision-machined components, forged pistons and serviceable oiling features for reliable performance.

€2,488.20 ~~€3,128.03~~

128" Power Package for 114"/117" Oil Cooled M8 — 128", 4.250" bore, 4.500" stroke, 11.1:1, Wrinkle Black

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S&S CYCLE 128" Power Package for 114"/117" Oil Cooled M8 — 128", 4.250"...

Complete bolt-on big-bore kit that raises displacement without case machining. Includes cylinders, forged pistons, upgraded oil pump/cam plate, valvetrain hardware, and all gaskets and bearings for installation.

€2,856.80 ~~€3,591.40~~

128" Power Package Engine Performance Kit — 4.250" bore, 4.500" stroke, 11.1:1

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S&S CYCLE 128" Power Package Engine Performance Kit — 4.250" bore,...

Bolt-on big-bore performance kit that increases displacement with forged pistons, S&S 550 cams, enhanced oiling and all gaskets and hardware for installation. Made in the U.S.A.

€2,488.20 ~~€3,128.03~~

128" Power Package Engine Performance Kit — 128", 4.250" bore, 4.500" stroke, 11.1:1, Black Granite

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S&S CYCLE 128" Power Package Engine Performance Kit — 128", 4.250" bore,...

Bolt-on big-bore kit for M-Eight engines. Includes forged pistons, S&S oil pump/cam plate, cams, springs, pushrods, premium tappets, gaskets, bearings, and hardware. Made in the U.S.A.

€2,644.23 ~~€3,324.17~~

$128\" Power Package for 114\"/117\" Oil Cooled M8 —4.25\" bore, 4.5\" stroke$

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S&S CYCLE 128\" Power Package for 114\"/117\" Oil Cooled M8 —4.25\"...

Complete bolt‑on big‑bore kit to increase 114\"/117\" M‑Eight engines to 128\"; includes cylinders, forged pistons, S&S 550 cam, oil pump/cam plate and all gaskets and hardware.

€2,695.25 ~~€3,388.31~~

Tornado Turbo Performance Kit — Black, TRASK

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TRASK Tornado Turbo Performance Kit — Black, TRASK

Bolt-on turbo kit that adds 40%–50% more power to stock 107", 114" and 117" M-Eight motors; includes injectors, tune files and all install hardware. Requires Thundermax ECM; offroad use only.

€6,204.07 ~~€7,799.40~~

132" Power Package Engine Performance Kit — 4.320" bore, 4.500" stroke, water-cooled

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132" Power Package Engine Performance Kit — 4.320" bore,...

Complete big-bore kit to convert 114"/117" water-cooled M8 engines to 132" with serviceable components and retained engine height and serials.

€2,428.27 ~~€3,052.69~~

$132\" Power Package Engine Performance Kit — 132\", 4.320\" bore, 4.500\" stroke, Black Granite$

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S&S CYCLE 132\" Power Package Engine Performance Kit — 132\", 4.320\"...

Complete 132" engine performance kit converts 114"/117" oil-cooled M8 to 132" with big-bore cylinders, performance-matched 550 cam, adjustable relief valve, and serviceable components.

€2,428.27 ~~€3,052.69~~

129" Power Package Engine Performance Kit — Bore 4.320", Stroke 4.375", Black

Reduced price

S&S CYCLE 129" Power Package Engine Performance Kit — Bore 4.320",...

Converts a 107" oil‑cooled M8 to 129" without case machining. Big-bore cylinders, matched cam and pump, MLS head gaskets. Made in USA.

€2,928.22 ~~€3,681.19~~

$132\" Power Package Engine Performance Kit — 132\", 4.320\" bore, 4.500\" stroke$

Reduced price

S&S CYCLE 132\" Power Package Engine Performance Kit — 132\", 4.320\"...

Converts 114" or 117" water-cooled M8 to 132" displacement; includes big-bore cylinders, 550 performance cam, MLS head gaskets, and cam cover badge. Retains stock engine height and serial numbers.

€3,026.84 ~~€3,805.17~~

129" Power Package Engine Performance Kit — 129", bore 4.320", stroke 4.375", black

Reduced price

S&S CYCLE 129" Power Package Engine Performance Kit — 129", bore 4.320",...

Converts a 107" oil-cooled M8 to 129" with big-bore cylinders, matched cam and oil pump, MLS head gaskets; works with the stock crankcase.

€2,572.82 ~~€3,234.39~~

132" Power Package Engine Performance Kit — 4.320" bore, 4.500" stroke, Black

Reduced price

S&S CYCLE 132" Power Package Engine Performance Kit — 4.320" bore,...

Complete S&S 132" Power Package kit to upgrade compatible 114" or 117" oil-cooled M8 engines; retains serial numbers, works with stock crankcase, and includes cam cover badge.

€2,572.82 ~~€3,234.39~~

132" Power Package Engine Performance Kit — Bore 4.320", Stroke 4.500", Black Granite

Reduced price

S&S CYCLE 132" Power Package Engine Performance Kit — Bore 4.320",...

Complete kit to convert 114" or 117" oil-cooled M8 engines to 132" displacement while retaining stock height and serial numbers. Includes adjustable pressure relief valve, S&S valve springs, big-bore cylinders, MLS head gaskets and a performance-matched 550 cam.

€3,026.84 ~~€3,805.17~~

129" Power Package Engine Performance Kit — 129", 4.320" bore, 4.375" stroke, Black

Reduced price

S&S CYCLE 129" Power Package Engine Performance Kit — 129", 4.320" bore,...

Complete kit to convert a 107" oil-cooled M8 into a 129" performance engine; includes matched cam, cam plate, oil pump, MLS head gaskets and serviceable passage plugs.

€3,026.84 ~~€3,805.17~~

129" Power Package Engine Performance Kit — 4.320" bore, 4.375" stroke, Black

Reduced price

S&S CYCLE 129" Power Package Engine Performance Kit — 4.320" bore,...

Complete Power Package kit converts the 107" oil-cooled M8 to a big-bore setup with matched cam, oil pump, MLS gaskets and serviceable components.

€2,572.82 ~~€3,234.39~~

Reduced price
Out of Stock

S&S CYCLE 132" High Compression / 136" Big Bore Kit — 132"/136",...

High-compression big-bore kit for V-twin performance builds; requires the correct flywheel for larger bore increases (flywheel sold separately).

€1,349.11 ~~€1,695.95~~

Reduced price
Out of Stock

S&S CYCLE S&S CYCLE BIG BORE KIT - M8 17-UP - 132/

BIG BORE KIT - M8 17-UP - 132/

€1,349.11 ~~€1,695.95~~

Reduced price
Out of Stock

S&S CYCLE Big Bore Kit — 132", 136", 4-1/2" stroke, 4-5/8" stroke

132" high-compression kit fits 114"/117" motors with a 4-1/2" stroke flywheel only. 136" big-bore requires an S&S 4-5/8" stroke flywheel (sold separately).

€1,349.11 ~~€1,695.95~~

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