S&S CYCLE - 310-1395A - Engine Performance Kit - '17-'23 Harley-Davidson Heritage Classic 107, Softail Standard 107, Street Glide Special
This Engine Performance Kit brings an updated profile compatible with VVT-equipped M8 engines, taking a 107" engine to 129" of displacement in a bolt-on kit with no case machining for '17-'23 Harley-Davidson models. S&S's oil pump/cam plate runs independent scavenge sections for the flywheel cavity and cam chest, backed by debris screens, a cam-chest magnet, and more oil flow capacity than stock.
Features
- Updated profile to fit M8 models including the VVT models
- Big bore bolt-on kit increases 107" M8 to 129" with no case machining required
- S&S oil pump/cam plate
- Passage plugs are removable for servicing
- Independent scavenge sections for flywheel cavity and cam chest
- Debris screen in both scavenge pickups
- Magnet in cam chest to help prevent debris from entering the oil pump
- Increased oil flow capacity on both the oil feed and scavenge side
- Adjustable pressure relief valve can be adjusted with the unit installed in the engine
- Quickee pushrods with pushrod tubes
- S&S premium tappets
- S&S hard anodized, black coated tappet cuffs are billet aluminum construction
- S&S valve springs; work with cams up to 0.605" lift
- High performance conical single wire spring design
- MLS (multi-layered steel) head gasket
- 496 camshaft
- Made in the USA
- Retains stock engine height.
- Works with stock crankcases.
- Works with the stock and S&S roller rocker arms.
- Original engine serial numbers are retained.
- Compatible with the stock valve springs, both first generation (round port) and second generation (oval port).
Specs
- Cooling System: Oil Cooled
- Features: Black Pushrod Tubes
- Product Name: Power Package
- Stroke Length: 4.375"
- Style: 496 Series
- Type: Engine
- Cam Drive Type: Chain
- Displacement: 129"
- Riding Style: Street
- Bore Size: 4.320"
- Features: Cam Chain Tensioner
- Color/Finish: Highlighted Fins
- Color/Finish: Wrinkle Black
- Compression Ratio: 11.0:1
- Model: Performance Kit
- Units: Kit
Frequently Asked Questions - S&S CYCLE - 310-1395A - Engine Performance Kit - '17-'23 Harley-Davidson Heritage Classic 107, Softail Standard 107, Street Glide Special
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.
