Extreme PSI :: Engine :: Engine Internals :: Pistons :: MAHLE Motorsport PowerPak Piston Kit: Subaru WRX STi EJ25 2004-2018 (High Compression)

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MAHLE Motorsport PowerPak Piston Kit: Subaru WRX STi EJ25 2004-2018 (High Compression) #32594

MAHLE Motorsport PowerPak Piston Kit: Subaru WRX STi EJ25 2004-2018 (High Compression) #32594

MAHLE Motorsport PowerPak Piston Kit: Subaru WRX STi EJ25 2004-2018 (High Compression)
 
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The MAHLE Motorsports Power Pak kit is our high volume shelf stock program developed for high performance enthusiasts and sportsman class racers. The Power Pak pistons are predominately made from 4032 aluminum alloy to allow for tighter cylinder to wall clearances, and improved temperature stability. Some applications require 2618 alloy including the Power Pak Plus category. Each kit is complete with a set of high performance rings, containing a low drag 1.5mm, 1.5mm, 3.0mm set or 1/16’, 1/16”, 3/16” high performance Ring Pak standard with big block kits.

Power Pak feature includes:

  • Forged piston for performance applications
  • Fully-machined crown
  • Grafal anti-Friction coating on skirts*
  • Phosphate-coated to reduce micro-welding and pin galling**
  • Pin bores binished on CNC boring equipment
  • Deburred
  • High strength, light weight steel pins
  • Race proven round wire locks
  • Low drag ring pak
  • Light weight slipper kirt forgings

Piston Specifications:

  • Stroke: 79mm
  • Rod Length: Stock
  • Pin Diameter: 23mm
  • Compression Height: 30.7mm
  • Dome Volume: -14.3cc
  • Weight in Grams: 99.5mm = 411, 99.75mm = 414, 100mm = 418
  • Compression Ratio: 50cc 9.6:1, 56cc 9.0:1  *CR calculated at 0.3mm below deck and 0.6mm head gasket thickness
  • Alloy: 4032
  • 1.2, 1.2, 2.5mm Performance Ring Set Included
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Retail price: $638.76
Our price:
$542.95
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Prop65 WARNING: Cancer and Reproductive Harm. (www.p65warnings.ca.gov)

 

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