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S&S Cycle 129" Big Bore Kit For Harley 107" Milwaukee-Eight 2017-2026

Name: S&S Cycle 129" Big Bore Kit For Harley 107" Milwaukee-Eight 2017-2026
Brand: S&S Cycle
SKU: 10555234
Price: 1643.95 USD
Availability: InStock

Item: P1033521

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Turn your 107 cubic inch Milwaukee Eight into a 129 cubic inch monster. S&S Cycle has done it again with their bolt-on big bore kit featuring a 4.32” … Read More

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Product Description

Part Numbers

Fitment

Instructions

S&S Cycle 129" Big Bore Kit For Harley 107" Milwaukee Eight

Turn your 107 cubic inch Milwaukee Eight into a 129 cubic inch monster. S&S Cycle has done it again with their bolt-on big bore kit featuring a 4.32” bore and 11:1 compression ratio. This cylinder and piston kit will accommodate a high lift cam and keep your Harley-Davidson M8 happy on pump gas. No case mods, no engine removal; just a massive set of jugs, designed, tested, and manufactured here in the USA.

Features:

Huge bore increase means huge power increase
Works with stock crankcases (no machine work)
Powder coat finish matches factory finish
MLS (multi-layered steel) head gaskets
4.320" Bore
Retains stock engine height
Includes cubic inch cam cover badge
Made in USA

Product Style	RevZilla Item #	Store Sku	MFR. Product #	Availability
Product Style Non-Highlighted Fins	RevZilla Item #10555235	Store Sku	MFR. Product #910-0844A	AvailabilityIn Stock: Ships within 24 hours
Product Style Highlighted Fins	RevZilla Item #10555234	Store Sku	MFR. Product #910-0843A	AvailabilityIn Stock: Ships within 24 hours

This product is vehicle specific.

Select a vehicle to ensure fitment.

Select Your Vehicle

Fitment Notes & Exceptions

This product is not legal for street use on an emissions-controlled vehicle. It may be used on dedicated competition or pre-pollution-controlled vehicles only.

Fits models with 107" Milwaukee Eight engines only

This Product Fits

Harley Davidson: Electra Glide Standard FLHT 2019, 2020, 2021, 2022; Electra Glide Ultra Classic FLHTCU/I 2017, 2018, 2019; Electra Glide Ultra Limited FLHTK 2017-2024; Electra Glide Ultra Limited Low FLHTKL 2017, 2018, 2019; Revival FLH 2021; Road Glide 3 FLTRT 2026; Road Glide CVO ST FLTRXSTSE 2024, 2025, 2026; Road Glide FLTRX 2017-2026; Road Glide Limited FLTRK 2020, 2021, 2022, 2023, 2024; Road Glide Limited FLTRXL 2026; Road Glide Special FLTRXS 2021, 2022, 2023; Road Glide ST FLTRXST 2022, 2023; Road Glide Ultra FLTRU 2017, 2018, 2019; Road King FLHR/I 2017-2022; Softail Breakout FXBR 2018, 2019; Softail Deluxe FLDE 2018, 2019, 2020; Softail Fat Bob FXFB 2018, 2019; Softail Fat Boy FLFB 2018, 2019; Softail Heritage Classic FLHC 2018, 2019, 2020, 2021; Softail Low Rider FXLR 2018, 2019, 2020; Softail Low Rider S FXLRS 2020-2026; Softail Low Rider ST FXLRST 2022, 2023, 2024, 2025, 2026; Softail Slim FLSL 2018, 2019, 2020, 2021; Softail Sport Glide FLSB 2018, 2019, 2020, 2021; Softail Standard FXST 2020, 2021, 2022, 2023, 2024; Softail Street Bob FXBB 2018, 2019, 2020; Street Glide CVO ST FLHXSTSE 2026; Street Glide FLHX/I 2017-2026; Street Glide Limited FLHXL 2026; Street Glide Special FLHXS 2021, 2022, 2023; Street Glide ST FLHXST 2022, 2023; Street Glide Ultra FLHXU 2025

S&S Cycle 129" Big Bore Kit For Harley 107" Milwaukee-Eight 2017-2026 Instructions

Instructions.pdf