Extreme PSI :: Engine :: Engine Internals :: Pistons :: MAHLE Motorsport PowerPak Plus Boxed Strut Construction Piston Kit: Subaru WRX STi EJ25 2004-2018

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MAHLE Motorsport PowerPak Plus Boxed Strut Construction Piston Kit: Subaru WRX STi EJ25 2004-2018 #32593

MAHLE Motorsport PowerPak Plus Boxed Strut Construction Piston Kit: Subaru WRX STi EJ25 2004-2018 #32593

MAHLE Motorsport PowerPak Plus Boxed Strut Construction Piston Kit: Subaru WRX STi EJ25 2004-2018
 
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*PowerPak Plus 2618 Alloy & Hard Anodized Top Ring Groove For Extreme Duty Applications

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
  • Boxed Strut Construction: added strength for extreme duty applications.

Piston Specifications:

  • Stroke: 79mm
  • Rod Length: Stock
  • Pin Diameter: 23mm
  • Compression Height: 30.7mm
  • Dome Volume: -14.1cc
  • Weight in Grams: 99.5mm =403, 99.75mm = 406, 100mm = 409
  • Compression Ratio: Head 50cc 9.7:1, Head 56cc 9.0:1 *CR calculated at 0.3mm below deck and 0.6mm head gasket thickness
  • Alloy: 2618
  • 1.2, 1.2, 2.5mm Performance Ring Set Included
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Retail price: $1069.69
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$909.27
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PROPOSITION 65
Proposition 65 requires businesses to provide warnings to Californians about significant exposures to chemicals that cause cancer, birth defects or other reproductive harm.

Prop65 WARNING: Cancer and Reproductive Harm. (www.p65warnings.ca.gov)

 

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