IAG Performance Stage 3 Extreme EJ25 Subaru Closed Deck Short Block for (WRX/STi/LGT/FXT)
IAG
In Stock
Description
item: IAG Performance Stage 3 Extreme EJ25 Subaru Closed Deck Short Block (WRX/STi/LGT/FXT)
Description
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 required and 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.
Power:
- The IAG Stage 3 Extreme Short Block has a power output rating of 800BHP.
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 (Sold Separately)
Additional Options Available:
- Head Studs - IAG Performance 1/2" head stud set manufactured by ARP (Sold Separately)
- Oil Pump - Subaru JDM 12mm High Volume Oil Pump or 11mm Subaru Oil Pump (Sold Separately)
- Head Gaskets - JE Pro Seal .039" Head Gaskets (Sold Separately)
- Hardware/Seals - OEM cover and seal kit (Sold Separately)
Not planning on reusing your original short block service plugs and covers? IAG offers a simple comprehensive cover and seal kit that includes:
- (1) Rear main seal
- (3) OEM wrist pin plugs
- (3) OEM wrist pin plug washers
- (1) OEM separator cover
- (6) OEM separator cover bolts
- (1) OEM wrist pin service cover
- (1) OEM wrist pin service cover O-ring
- (2) OEM wrist pin service cover screws.
If you are reusing your original wrist pin service plugs and covers always replace the following components before installing a short block to avoid potential leaks:
- (3) OEM wrist pin plug washers
- (1) wrist pin service cover O-ring
Never reuse a rear main seal on a new short block.
Note: All IAG Short Blocks are balanced and blueprinted.
Please review the PDF document below regarding installation, break-in procedures and warranty information.
compatibility
Note: Additional modification required for EJ20 heads. Please consult engine builder if using EJ20 heads to account for correct valve clearance and compression
- 2001-2014 Subaru WRX
- 2002-2020 Subaru STI
- 2004-2009 Subaru Liberty GT
- 2003-2013 Subaru Forester XT
Specifications
SKU | IAG-ENG-1354 |
Brand | IAG |
Shipping Weight | 40.0000kg |
Shipping Width | 0.800m |
Shipping Height | 0.200m |
Shipping Length | 0.800m |