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124" Power Package

  • Bolt-on kit
  • With updated fins
  • No case machining required
  • Forged pistons
  • Made in the USA
  • Includes oil pump/cam plate, pushrods, tappets, tappet cuffs, 550 camshaft, valve springs
  • Oil Pump/Cam Plate:
  • Precision machined from billet aluminum
  • Passage plugs removable for servicing
  • Independent scavenge sections for flywheel cavity and camchest
  • Debris screens in both scavenge pickups
  • Magnet in camchest to help to stop debris from entering oil pump
  • 44% flow increase on supply side and 58% flow increase on scavenge side
  • Pressure relief valve is adjustable with unit installed in engine
  • Pushrods:
  • Quickee pushrods
  • Tappets:
  • Hand assembled to exacting tolerances
  • Reduced valve train noise from start up to shut down
  • Close tolerances for low leak down rates
  • Tappet Cuffs:
  • Hard anodized black coating
  • Billet aluminum construction
  • Tappet stability in high lift and high rpm sitiuations
  • Camshaft:
  • S&S 550 camshaft - designed for big bore applications
  • Valve Springs:
  • Works well with camshafts up to 0.605" lift
  • High performance conical single wire spring
  • Includes top collars, keepers, valve seals and bottom collars
Brand
S&S CYCLE
Vendor Part Number
310-1058C
Bore Size
4,250"
Cam Drive Type
Gear
Color/Finish
Black, Highlighted Fins
Compression Ratio
11,1:1
Cooling System
Oil Cooled
Displacement
124"
Features
Quickee Pushrods w/Gloss Black Covers, Includes Outer Drive Gears
Model
Power Package
Product Name
Performance Kit
Stroke Length
4,375"
Type
Big Bore
Units
Kit
FatBook 2026

S&S CYCLE

PowerPak Oil Cool 4.25"Bore4.375"Stroke M8 Blk w/Highlights

09040139 / 310-1058C

4.702,68EUR*
*incl. 19% VAT

6 In Stock
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