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IAG Stage 3 Tuff EJ25 Closed Deck Converted Case Halves Bored Honed 1/2in Head Stud Conversion - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
IAG Stage 3 Tuff EJ25 Closed Deck Converted Case Halves Bored Honed 1/2in Head Stud Conversion - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)

IAG Stage 3 Tuff EJ25 Closed Deck Converted Case Halves Bored Honed 1/2in Head Stud Conversion

Subaru Models (inc. 2006-2014 WRX / 2004+ STI)

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Part # IAG-ENG-1912
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Features & Product Details

RallySport Direct now carries highly sought-after high-performance upgrades and accessories brought to you by IAG Performance. 

On this page, you are looking at the IAG Performance Stage 3 Tuff EJ25 Closed Deck Converted Case Halves. This particular example has been bored and honed to 99.75mm, and it has been machined for 1/2" head studs (head studs sold separately). 

This is one of the most cost-effective short block modifications for high-horsepower applications for those of you who want a cost-effective means to handle the perils of high horsepower and high-boost applications. 

Here are more details:

  • The cast insert material used to fill the open deck closely matches the metallurgy of the aluminum case material in a factory EJ engine block
  • The material ensures that during expansion and contraction the materials grow and shrink at similar rates
  • The outer inserts are machined from 3/4" cast material and the inner inserts from 1-inch cast material
  • When the deck is resurfaced, the result is a true 1/2" finished outer insert thickness and true 3/4" finished inner insert thickness
  • Closed deck conversion is performed 100% in-house using state-of-the-art equipment
  • The case begins as a new OEM EJ25 bare case that is loaded and fixtured to a 4th axis rotary indexer in a 2015 Haas VF4-SS CNC Vertical Machining Center
  • 12 pockets are milled out for CNC inserts to exact dimensions creating a consistent area that accepts the precision inserts
  • Bored and honed to 99.75mm, ready for assembly
  • Machined for 1/2" head stud conversion (head studs sold separately)
  • Specifications

    Brand: IAG Performance
    Assembly: Case Halves Only
    Bore Size (mm): 99.75
    Displacement: 2.5L
    Mfgr. Warranty: 12 Months / 12k Miles
    Condition: New Product
    Return Policy:
    Standard

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