S&S Cycle - 128" Power Packages fits '17-'21 M8 Water/Oil-Cooled Engines

S&S Cycle - 128" Power Packages fits '17-'20 M8 Water/Oil-Cooled Engines

This Power Package increases your 114"/117" with a 4-1/2" stroke M8 to 128". It is available in a wrinkle black or black granite finish and your choice of cylinders with or without fin highlighting. You can also choose between a chain drive cam or a gear drive cam.

Features

• Big Bore Kit:
• 114" to 128" Big Bore Kit
• 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 Removable for servicing
• Independent 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
• Pushrods:
• Quickee Pushrods w/Chrome Pushrod Tubes
• Tappets:
• 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
• Cam:
• S&S 550 Cam- Designed for Big Bore Applications
• Gear Drive Cam provides improved cam timing accuracy and eliminate the stock cam chain tensioner
• Gear Drive kit includes outer Drive Gears
• 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
• MADE IN U.S.A.