S&S 310-1225 129" Big Bore Kit chain cam black highlight Oil cooled M8
129" Power Pack with Black Pushrod Tubes and Cam Chain Tensioners, Chain Drive Cam, Black Finish with Highlight Fins, For Oil Cooled 2017-up M8 Models
The S&S Power Package is the ideal combination of performance and savings designed to transform your engine without breaking the bank. The latest kits combine our biggest big bore cylinders (4.32") with matched cam/cam plate/oil pump and everything else a high performance cam chest needs to make big, reliable horsepower. Transform your 107" to 129" and your 114/117" to a 132" monster.
107" to 129" Big Bore Kit:
- Available With or Without Fin Highlighting
- Bolt-On Kit — No Case Machining Required
- 4.320" Bore
- Forged Pistons
- 11.1 Compression Ratio
Oil Pump/Cam Plate:
- Precision Machined from Billet Aluminum
- Independent Scavenge Sections for Flywheel Cavity & Cam Chest
- Debris Screens in Both Scavenge Pickups
- Magnet in Cam Chest to Help to Stop Debris from Entering Oil Pump
- 44% Flow Increase on Supply Side & 58% Flow Increase on Scavenge Side
- Pressure Relief Valve is Adjustable with Unit Installed in Engine
- Kits Now Include Updated Oil Pump with Groove for Optional OEM Oil Seal
Pushrods:
- Quickee Pushrods
- Chrome or Black Pushrod Tubes Available
Tappets:
- Hand Assembled to Exacting Tolerances
- Reduced Valve Train Noise from Start Up to Shut Down
- Close Tolerances for Low Leak Down Rates
- Fast Pump Up and Superior High RPM Performance
Tappet Cuffs:
- Hard Anodized Black Coating
- Billet Aluminum Construction
- Improve Tappet Stability in High Lift & High RPM Situations
Cam:
- S&S 550 Cam- Designed for Big Bore Applications
- Available in Both Gear Drive & Chain Drive Variations
- Gear Drive Kits Provide Improved Cam Timing Accuracy
- Gear Drive Kits Include Outer Drive Gears
Valve Springs:
- High Performance Conical Single Wire Spring
- Includes Top Collars, Keepers, & Valve Seals/Bottom Collars
Cam Chain Tensioner:
- Comes with Chain Drive Kits
- Precision Machined from Billet Aluminum
- Thicker Shoe for Longer Wear
- Direct Chain Oiling
- Larger Piston for More Consistent Pressure
- Tighter Tolerances Improves Stability
NOTES
Requirements: S&S Cycle Head Bolts for M8, part number 900-1006
