The S&S CYCLE Power Pack Oil Cooled 550G is a big-bore bolt-on kit for 107-inch M8 engines, increasing displacement to 129 inches without case machining. It features 4.32-inch bore cylinders with forged pistons and an 11.0:1 compression ratio. The kit has a wrinkle black finish with highlight detailing and includes chrome pushrod tubes. Manufacturer part number: 310-1224D. Distributor part number: 09040205.
The S&S CYCLE oil pump and cam plate feature a blue anodized finish, removable passage plugs for servicing, independent scavenge sections for the flywheel cavity and cam chest, debris screens in both scavenge pickups, and a cam-chest magnet to help prevent debris from entering the oil pump. Increased oil-flow capacity is provided on both the feed and scavenge sides, while the adjustable pressure relief valve can be adjusted with the unit installed in the engine.
Additional components include Quickee pushrods, S&S premium tappets, hard-anodized black-coated billet aluminum tappet cuffs, S&S 550 cams designed for big-bore applications, and high-performance conical single-wire valve springs compatible with cams up to 0.605-inch lift. The kit is made in the USA and fits VVT models. Intake and rocker cover gaskets are not included. Not for Trike models.
Vehicle fitment includes the 2019 Harley-Davidson FLDE Deluxe 107, 2019 FLHRC Road King Classic, 2026 FLHX Street Glide, 2018, 2020, 2021, and 2023 FLHXS Street Glide Special, 2019 FLSL Softail Slim 107, and 2022 and 2023 FLTRX Road Glide.
Features:
- Big-bore bolt-on kit increases 107-inch M8 engines to 129 inches without case machining
- 4.32-inch bore cylinders with forged pistons and an 11.0:1 compression ratio
- S&S CYCLE oil pump and cam plate with blue anodized finish
- Independent scavenge sections for the flywheel cavity and cam chest
- Debris screens in both scavenge pickups and a cam-chest magnet
- Increased oil-flow capacity on the feed and scavenge sides
- Adjustable pressure relief valve can be adjusted with the unit installed
- Quickee pushrods and S&S premium tappets
- Hard-anodized, black-coated billet aluminum tappet cuffs
- S&S 550 cams designed for big-bore applications
- High-performance conical single-wire valve springs for cams up to 0.605-inch lift
- Wrinkle black finish with highlight detailing and chrome pushrod tubes
- Made in the USA
- Fits VVT models
- Not for Trike models; intake and rocker cover gaskets are not included
Fitment:
2017 Harley-Davidson FLHR Road King
2017 Harley-Davidson FLHRC Road King Classic
2017 Harley-Davidson FLHX Street Glide
2017 Harley-Davidson FLHXS Street Glide Special
2017 Harley-Davidson FLTRX Road Glide
2017 Harley-Davidson FLTRXS Road Glide Special
2018 Harley-Davidson FLDE Deluxe 107
2018 Harley-Davidson FLFB Fat Boy 107
2018 Harley-Davidson FLHC Heritage Classic 107
2018 Harley-Davidson FLHR Road King
2018 Harley-Davidson FLHRC Road King Classic
2018 Harley-Davidson FLHX Street Glide
2018 Harley-Davidson FLHXS Street Glide Special
2018 Harley-Davidson FLSB Sport Glide 107
2018 Harley-Davidson FLSL Softail Slim 107
2018 Harley-Davidson FLTRX Road Glide
2018 Harley-Davidson FLTRXS Road Glide Special
2018 Harley-Davidson FXBB Street Bob 107
2018 Harley-Davidson FXBR Breakout 107
2018 Harley-Davidson FXFB Fat Bob 107
2018 Harley-Davidson FXLR Low Rider 107
2019 Harley-Davidson FLDE Deluxe 107
2019 Harley-Davidson FLFB Fat Boy 107
2019 Harley-Davidson FLHC Heritage Classic 107
2019 Harley-Davidson FLHR Road King
2019 Harley-Davidson FLHRC Road King Classic
2019 Harley-Davidson FLHX Street Glide
2019 Harley-Davidson FLHXS Street Glide Special
2019 Harley-Davidson FLSB Sport Glide 107
2019 Harley-Davidson FLSL Softail Slim 107
2019 Harley-Davidson FLTRX Road Glide
2019 Harley-Davidson FLTRXS Road Glide Special
2019 Harley-Davidson FXBB Street Bob 107
2019 Harley-Davidson FXBR Breakout 107
2019 Harley-Davidson FXFB Fat Bob 107
2019 Harley-Davidson FXLR Low Rider 107
2020 Harley-Davidson FLDE Deluxe 107
2020 Harley-Davidson FLFB Fat Boy 107
2020 Harley-Davidson FLHC Heritage Classic 107
2020 Harley-Davidson FLHR Road King
2020 Harley-Davidson FLHX Street Glide
2020 Harley-Davidson FLHXS Street Glide Special
2020 Harley-Davidson FLSB Sport Glide 107
2020 Harley-Davidson FLSL Softail Slim 107
2020 Harley-Davidson FLTRX Road Glide
2020 Harley-Davidson FLTRXS Road Glide Special
2020 Harley-Davidson FXBB Street Bob 107
2020 Harley-Davidson FXLR Low Rider 107
2020 Harley-Davidson FXST Softail Standard 107
2021 Harley-Davidson FLHC Heritage Classic 107
2021 Harley-Davidson FLHR Road King
2021 Harley-Davidson FLHX Street Glide
2021 Harley-Davidson FLHXS Street Glide Special
2021 Harley-Davidson FLSB Sport Glide 107
2021 Harley-Davidson FLSL Softail Slim 107
2021 Harley-Davidson FLTRX Road Glide
2021 Harley-Davidson FLTRXS Road Glide Special
2021 Harley-Davidson FXST Softail Standard 107
2022 Harley-Davidson FLHR Road King
2022 Harley-Davidson FLHX Street Glide
2022 Harley-Davidson FLHXS Street Glide Special
2022 Harley-Davidson FLTRX Road Glide
2022 Harley-Davidson FLTRXS Road Glide Special
2022 Harley-Davidson FXST Softail Standard 107
2023 Harley-Davidson FLHX Street Glide
2023 Harley-Davidson FLHXS Street Glide Special
2023 Harley-Davidson FLTRX Road Glide
2023 Harley-Davidson FLTRXS Road Glide Special
2023 Harley-Davidson FXST Softail Standard 107
2024 Harley-Davidson FLHX Street Glide
2024 Harley-Davidson FLTRX Road Glide
2024 Harley-Davidson FXST Softail Standard 107
2025 Harley-Davidson FLHC Heritage Classic 117
2025 Harley-Davidson FLHX Street Glide
2025 Harley-Davidson FLTRX Road Glide
2025 Harley-Davidson Softail Breakout FXBR
2025 Harley-Davidson Softail Fat Boy FLFB
2025 Harley-Davidson Street Glide EFI FLHX
2026 Harley-Davidson FLFB Fat Boy 117
2026 Harley-Davidson FLHC Heritage Classic 117
2026 Harley-Davidson FLHX Street Glide
2026 Harley-Davidson FLTRX Road Glide
2026 Harley-Davidson FXBR Breakout 117