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S&S 128" Power Pack

S&S 128" Power Pack

This part is bike specific. It will not fit all makes / models / years.

If you enter fitment information, we'll only show you the options that work for your bike.

$ 2,834.95 - 3,040.95 Add to Cart to See Lowest Price Enter your bike's fitment to see our inventory levels. Free Shipping Eligible!
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Product Overview

• 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.

Product Specs


• Product Name: Power Package


• Type: Engine


• Finish: Chrome


• Bore Size: 4.250"


• Compression Ratio: 11.1:1


• Units: Kit


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