Product Description
The S&S CYCLE PowerPak WaterCool 4.25″Bore4.375″Stroke M8 Blk w/Highlite is available at Knobtown Cycle, serving Kansas City riders since 2004.
Key Features
- Bolt-on kit
- With updated fins
- No case machining required
- 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
- 44% flow increase on supply side and 58% flow increase on scavenge side
- Pressure relief valve is adjustable with unit installed in engine
- Pushrods:
- Quickee pushrods
- Tappets:
- Hand assembled to exacting tolerances
- Reduced valve train noise from start up to shut down
- Close tolerances for low leak down rates
- Tappet Cuffs:
- Hard anodized black coating
- Billet aluminum construction
- Tappet stability in high lift and high rpm sitiuations
Product Specifications
- Part Number: 09040147
- Brand: S&S CYCLE
- Weight: 45.50 lbs
Professional Installation Available
Buy online or visit our Kansas City showroom. Contact us for installation service options! Free Ship to Store!
Notes: REPLACED 09040056
Part Locations
| Location |
Available |
| Wisconsin (WI) |
2 |
| New York (NY) |
0 |
| Texas (TX) |
0 |
| Nevada (NV) |
0 |
| North Carolina (NC) |
0 |
| National Total |
2 |
Stock levels last updated: February 13, 2026 10:53 AM
Professional Installation Available
Knobtown Cycle offers professional installation services. Contact us via a service request to learn more.
Thank you for Shopping at Knobtown Cycle!
When you shop with us, you’re not just buying motorcycle parts — you’re supporting a small, family-run business rooted right here in the heartland of America. Every order helps us keep riders on the road and fuels our passion for serving the motorcycle community.
From all of us at Knobtown Cycle, thank you for choosing local and riding with us.
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