Features

• Features

  • Big Bore Kit:
  • 107" to 124" / 114" to 128" big bore kits
  • Bolt on kit. No case machining required
  • 4.250" bore
  • Forged pistons
  • 11.1: compression ratio
  • Oil Pump/Cam Plate
  • Precision machined from billet aluminum
  • 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
  • Pressure Relief Valve is adjustable with unit installed in engine
  • Pushrods:
  • Quickee pushrods
  • Tappets:
  • S&S premium tappets
  • Tappet Cuffs:
  • 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
  • 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 USA

  Specs

  • Product Name: Performance Kit
  • Type: Engine
  • Style: 550G
  • Model: Power Package
  • Color/Finish: Black / Black Granite / Blue / Chrome / Highlighted Fins
  • Displacement: 128"
  • Bore Size: 4.250"
  • Compression Ratio: 11.1:1
  • Cam Drive Type: Gear
  • Cooling System: Oil Cooled
  • Units: Kit
  • Riding Style: Street

  Approximate Package Weight & Dimensions

  • Weight: 46.8 lbs
  • Height: 12.5"
  • Length: 27.25"
  • Width: 20.25"

  Catalog

  • 20 Drag FatBook™ / Page 663

  Vendor Part Number

  310-1110