Wiseco Sport Compact -19cc Pistons | Subaru WRX / STI EJ255/257 (K598M)

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Subaru EJ255 & EJ257 Sport Compact Pistons by Wiseco

Own a Subaru EJ255 or EJ257 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.

Specifications

  • Stroke: 3.110" (79mm)
  • Rod: 5.137" (130.5mm)
  • Comp Ht: 1.209" (30.7mm)
  • Head cc's: 51
  • Volume: -19cc
  • Gasket Thickness: 0.021" (0.5mm)
  • Deck Clearance: 0.012" (0.30mm)
  • Block Ht: 7.913" (201mm)
  • Comp Ratio: 9.0

Features

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

Benefits

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

Please Note

  • Most Wiseco Pistons have offset pins. (Pins must be offset, same as OEM, for quietest operation).

Applications

  • 2006 - 2014 Subaru WRX
  • 2004 - 2021 Subaru STI
  • 2004 - 2013 Subaru Forester XT
  • 2005 - 2012 Subaru Legacy GT
  • 2005 - 2009 Subaru Outback XT
  • 2004 - 2006 Subaru Baja XT
  • 2006 - 2006 Saab 9-2x

What's In The Box?

  • 1 - Sport Compact Piston Kit
  • Piston Pins and Rings

Warranty

  • 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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