S&S CYCLE - 310-1110D - 128" Power Package - '06-'26 Harley-Davidson Electra Glide Police FLHTPI, Softail Low Rider ST FXLRST, Electra Glide Police FLHTP
This 128" Power Package from S&S Cycle bolts into M8 Harley-Davidson engines for a displacement upgrade built on forged pistons and an updated profile. A 550 camshaft, pushrods, tappets, tappet cuffs, and valve springs come included, along with a precision-machined billet-aluminum oil pump/cam plate designed with removable passage plugs. Made in the USA.
Features
- Bolt-in
- Updated profile
- Forged pistons
- Made in the USA
- Includes oil pump/cam plate, pushrods, tappets, tappet cuffs, 550 camshaft, valve springs
- Oil Pump/Cam Plate:
- Precision machined from billet aluminum
- Passage plugs removable for servicing
- Independent scavenge sections for flywheel cavity and camchest
- Debris screens in both scavenge pickups
- Magnet in camchest to help to stop debris from entering oil pump
- Increased oil flow capacity on both the oil feed and scavenge side
- Pressure relief valve is adjustable with unit installed in engine
- Pushrods:
- Quickee pushrods
- Tappets:
- S&S premium tappets with hard anodized, billet aluminum, black coated tappet cuffs
- Tappet stability in high lift and high rpm sitiuations
- Camshaft:
- S&S 550 camshaft
- Valve Springs:
- Works well with camshafts up to 0.605" lift
- Includes top collars, keepers, valve seals and bottom collars
- No case machining required.
- Will fit VVT models.
- Not for any Trike models.
- Intake/rocker cover gaskets not included.
Specs
- Model: Performance Kit
- Product Name: Power Package
- Color/Finish: Highlighted Fins
- Units: Kit
- Color/Finish: Black Granite
- Features: Quickee Pushrods w/Chrome Covers
- Cooling System: Oil Cooled
- Riding Style: Street
- Displacement: 128"
- Bore Size: 4.250"
- Cam Drive Type: Gear
- Stroke Length: 4.500"
- Style: 550G
Frequently Asked Questions - S&S CYCLE - 310-1110D - 128" Power Package - '06-'26 Harley-Davidson Electra Glide Police FLHTPI, Softail Low Rider ST FXLRST, Electra Glide Police FLHTP
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
