Wiseco Sport Compact 85.50mm Bore -10cc Single Piston | Mitsubishi 6-Bolt 4G63 (6560M855)

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Mitsubishi 6-Bolt 4G63 Sport Compact Piston (Single) by Wiseco

Own a 6-Bolt 4G63 engine and plan on building a motor? Wiseco is proven to make some of the best pistons on the market!

Featuring valve pocket designs that allow maximum flow around valve, also allowing oversized valves and high lift cams to be utilized. Piston crown shapes designed to promote maximum intake charge efficiency thru scavenging mixture "cross flow" during intake and exhaust valve overlap. More fuel and air equals more horsepower!

Their pistons are designed to optimize squish or quench during compression combustion cycle event, resulting in resistance to detonation and pre-ignition. The end product is longer engine life and increased horsepower potential.


  • 2618 Aerospace Alloy for Superior Strength to Weight Ratio
  • ArmorGlide® Skirt Coating Increases Power and Reduces Piston Rock
  • Strutted Forging for Improved Strength


  • Resistance to detonation and pre-ignition.
  • Longer engine life and increased horsepower potential.
  • Maximum ring seal minimizes blow-by and oil consumption.

Please Note

  • This listing is for ONE (1) piston. Utilize the quantity selector if multiple are needed. A full set (K560M855) can also be purchased.


  • 1992 - 1995 Mitsubishi Evo 1-3
  • 1991 - 1992 Mitsubishi Galant VR-4
  • 1990 - 1992 DSM 6-Bolt 4G63


  • Bore: 3.366" (85.50mm)
  • Oversize: 0.020" (0.50mm)
  • Stroke: 3.465" (88mm)
  • Rod: 5.906 (150mm)
  • Comp Ht: 1.378 (35mm)
  • Head cc's: 47.0
  • Volume: -10cc
  • Gasket Thickness: 0.042" (1.1mm)
  • Deck Clearance: 0
  • Block Ht: 9.015 (229mm)
  • Compression Ratio: 9.0

What's In The Box?

  • 1 - Sport Compact Piston


  • WISECO warrants this product will be free from defects in material and workmanship for thirty (30) days following date of original purchase.

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