920-0142 M8 114" to 128" big bore piston kit. +.010"
Fits: 18-24 114"/117" Softail; 17-25 114"…
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Specifications
- Brand
- S&S
- Part Number
- 920-0142
- OEM Reference
- —
- Pack Quantity
- Sold as kit
- Category
- Pistons And Rings Kits
- VAT Rate
- 20%
About This Product
For those performing a top-end refresh or a precision build on a 128-inch Milwaukee-Eight conversion, this plus ten thousandths oversize piston kit from S&S is the professional choice. It is designed for 114 and 117-inch engines being upgraded to 128 inches, fitting 2018 to 2024 Softails and 2017 to 2025 Touring models, excluding the newest CVO and 2024-up fairing models. These forged pistons offer an 11.1:1 compression ratio and work with the factory 4.500-inch stroke. The kit includes pistons, rings, wristpins, and clips. Note that 4.250-inch big bore cylinders are required, and we highly recommend using S&S 550 series cams to maximize the power potential of this kit.
Manufacturer part number: 920-0142.
Fitment
18-24 114"/117" Softail; 17-25 114" FLT/Touring/117" FLT/Touring (excl. 23-25 CVO; 24-25 FLTRX; 24-25 FLHX; 2025 FLHXU)
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