Product Description
- 2002-2005 WRX
- 2006-2007 WRX
- 2004-2007 STi
- 2008-2014 STi
- 2015-2021 STi
- 2004-2008 Forester XT
- 2009-2013 Forester XT
- 2005-2009 Legacy GT
- Brand: IAG Performance
- Manufacturer's Part Number: IAG-ENG-1354
- Superseded From: IAG-ENG-1351
- Condition: New Product
FITMENTS:
Subaru
| Manufacturer's Description: IAG Stage 3 Extreme Subaru EJ25 Closed Deck Short Block The IAG Stage 3 Extreme Short Block starts with brand new Subaru 2.5L engine case halves. IAG machines the case halves assembled together in our Haas VF-4SS CNC mill to accept the IAG CLOSED Deck Inserts that transform the block into a solid deck. The unique inserts feature small passages that allow needed coolant flow to the deck surface. The case halves are then CNC machined with o-ring receiver grooves around the bore surface as well as drilled and tapped to accept larger 1/2" head studs that aids in preventing cylinder heads from lifting in high boost applications. Next, the short block is Deck Plate bored and honed to 99.75mm in our in-house Sunnen SV-30 the most advanced automotive cylinder hone available. IAG's in-house honing process is able to set custom piston to wall clearances to best fit your needs. The modified case halves are then assembled using a new 2017+ Subaru 2.5L nitride treated STI crankshaft that is matched to ACL or King race main bearings. Manley Turbo Tuff Tri-Beam connecting rods and ARP rod bolts are utilized along with ACL or King race rod bearings. The case halves are sealed with new OEM main/case bolts and sealant (upgrade to ARP mains and line hone service a la carte). IAG-Spec JE FSR 99.75mm Forged Pistons are chosen to finish the Stage 3 Extreme short block. Stage 3 Extreme Closed Deck Includes: Case Halves - Converted to Closed Deck using brand new Subaru OEM case halves, bored and honed to 99.75mm. O-Ringing - Machine and O-Ringed Deck Surface Head Studs - Machine case to fit 1/2" head studs - *Head studs sold separately Pistons - IAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Ring Set, .180" Chromoly wrist pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins) Connecting Rods - Manley Turbo Tuff Tri-Beam / ARP2000 Rod Bolts. Rod / Main Bearings - ACL or King Race bearings. Crankshaft - Standard New Subaru Nitride Treated 2017+ STI Crankshaft. Case / Main Bolts - Standard FHI Subaru case bolts. Additional Options Available: Head Studs - IAG Performance 1/2" head stud set manufactured by ARP - $499.99 Oil Pump - Subaru JDM 12mm High Volume Oil Pump - $219 or 11mm Subaru Oil Pump - $199.95 Head Gaskets - JE Pro Seal .039" Head Gaskets - (PN# SB1001-039 for D25 & B25 Heads, PN# SB1003-039 for V25, W25 & N25 Heads) Hardware / Seal Option - $105.99 (Wrist pin plugs, washers, separator cover, bolts, etc. In case you don't want to transfer from the original engine). Compression Ratio: 8.5:1 on D Cylinder Heads (EJ255) 8.2:1 on B, V and W EJ257 Heads with standard thickness gasket. Head Gasket Recommendations: *IAG Recommends JE Pro Seal .039 inch head gaskets Power: The IAG Stage 3 Extreme Short Block has a power output rating of 800BHP. *All IAG short blocks are balanced and blueprinted. |
Inventory Updated Daily
