S&S 114" 128" Oil Cooled Power Package 550C Chain Drive Granite Harley M8 17+

Designer: S&S Cycle

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Unit Price
SKU 310-1109B
Free delivery to the Lower 48 States
30 Day Returns and Exchanges
Fitmet Questions? Call us at 610-754-8500

PART # 310-1109B

Buy all of the matched parts in one kit and save $$$!

Big Bore Kit:
114" to 128" Big Bore Kit for Stock Stroke Flywheel
Black Granite Finish
Highlighted Fins
No case machining required
4.250" bore
Forged Pistons
11.1:1 Compression Ratio

Oil Pump/Cam Plate:
Precision Machined from Billet Aluminum
Blue Anodized Finish
Passage Plugs Removeable for servicing
Independant Scavenge Sections for Flywheel Cavity and Cam Chest
Debris Screens in both scavenge pickups
Magnet in Cam Chest to help to stop debris from entering oil pump
Increased Flow Capacity on both Feed and Scavenge side
Adjustable Pressure Relief Valve is adjustable with unit installed in engine

Quickee Pushrods w/Chrome Pushrod Tubes

S&S Precision Tappets

Tappet Cuffs:
Hard Anodized Black Coating
Billet Aluminum Construction
Stronger than Stock Material eliminates Distortion
Improve tappet stability in high lift and high rpm situations

S&S 550 Cam- Designed for Big Bore Applications
Chain Drive

Valve Springs:
Work well with cams up to .605 lift
High Performance Conical Single Wire Spring

Includes all gaskets, bearings, and hardware required for installation


Not recommended for Tri-Glide or other three wheel models including conversion due to lugging nature of these bikes.