Mahle PowerPak 99.75mm Bore 79mm Stroke Piston and Ring Kit Subaru WRX / STI EJ25 Models 2004-2017

$535.00
MPN
WRX209927I22
Manufacturer
Mahle
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Description

Mahle's PowerPak piston assemblies include forged pistons, piston rings, pins, and wire locks--all in one race-proven package. The pistons are hand-deburred and then coated with dry phosphate to protect against ring micro-welding and pin galling during initial startup. For additional performance, Mahle added its proprietary Grafal anti-friction coating to the piston skirts. Low drag rings, steel pins, and round wire locks complete the Mahle PowerPak package.

Specs:

  • Bore (in):3.927 in.
  • Bore (mm):99.750mm
  • Piston Style:Dish, with four valve reliefs
  • Piston Material:Forged aluminum
  • Compression Distance (in):1.209 in.
  • Piston Head Volume (cc):+22.00cc
  • Wrist Pin Style:Press-fit or floating
  • Pin Diameter (in):0.906 in.
  • Gapless:No
  • File Fit:No
  • Top Ring Thickness:1.2mm
  • Top Ring Material:Steel
  • Top Ring Facing Material:Gas nitrided
  • Second Ring Thickness:1.5mm
  • Second Ring Material:Cast iron
  • Second Ring Facing Material:Cast iron
  • Oil Ring Thickness:2.8mm
  • Oil Ring Material:Chrome plated carbon steel
  • Oil Ring Tension:Standard

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