MAHLE 930067351 PowerPak Forged Piston Kit 77.50mm Bore 10.3:1 CR M142P Alloy

The MAHLE 930067351 PowerPak Forged Piston Kit is a complete, race-proven piston assembly engineered for high-performance engine builds.

Each piston is forged from MAHLE's proprietary M142P aluminum alloy, which delivers the low thermal expansion characteristics of 4032 alloy with strength approaching that of 2618 alloy. This allows for tighter piston-to-wall clearances for quieter, smoother operation while maintaining the durability demanded by high-output applications.

Key Features:

• Bore Diameter: 77.50mm (+0.5mm over stock)
• Compression Height: 28.5mm
• Stroke: 85.8mm
• Rod Length: 138.2mm
• Wrist Pin Diameter: 20mm (floating steel pin)
• Crown Volume: -1.1cc (dished)
• Piston Mass: 273g per piston
• Compression Ratio: 10.3:1
• Piston Material: Forged M142P alloy
• Piston Style: Dome with 2 valve reliefs
• Ring Pack Thickness: 1.0mm / 1.2mm / 2.8mm
• Pin Style: Floating; Pin Mass: 84g
• Clip Style: Round wire (included)

Coatings & Surface Treatments:

• Dry Phosphate Coating: Applied to pin bores and ring grooves to prevent ring micro-welding and pin galling during initial startup and break-in
• Grafal® Anti-Friction Skirt Coating: MAHLE's proprietary skirt coating that reduces friction and extends piston service life
• Thermal Barrier Coating (TBC): Applied to the crown for added heat management

• 4x Forged M142P pistons
• 4x Steel wrist pins
• 4x Round wire lock clip sets

The MAHLE PowerPak system is a complete, cohesively engineered package trusted by professional race teams and performance engine builders worldwide. The piston crown remains machinable for custom compression ratio tuning as needed.