IAG Performance Performance/ Crest CNC Stage X EJ25 Subaru Billet Aluminum Short Block for (WRX/STi/LGT/
IAG
In Stock
Description
item: IAG Performance Performance/ Crest CNC Stage X EJ25 Subaru Billet Aluminum Short Block (WRX/STi/LGT/
Description
The CNC Billet Aluminum EJ case seeks to change the Subaru performance tuning market by reinventing the EJ and addressing virtually every weakness that exists in max-power builds.
Each IAG / Crest CNC Case is machined from 6061-T6 Aerospace Aluminum and features Darton Ductile Iron Sleeves. The block is designed with increased material thickness over the OEM cast aluminum case halves and adds a unique 4-bolt bottom end for additional strength.
The IAG / Crest CNC Stage “X” Block, (Formally Willall) is a complete short block built on the Crest billet platform, which also includes pistons, rods, bearings, crank, bore/hone, case bolts, line hone, and final assembly and blueprinting.
Stage X Billet EJ25 Case Features:
- Machined from solid billet 6061-T6 Aerospace grade aluminum
- Darton Ductile iron sleeves
- Increased material thickness in all known weak points (around head studs, bottom end location)
- Unique 4 bolt bottom end strengthening
- Threads are rolled into the block rather than conventionally cut for much greater strength
- Full cooling system operation
- Radiused coolant and oil galleries for improved flow and less foaming/turbulence
- Fits all factory engine bay ancillaries (i.e. AC/PS/etc.)
- Multiple Times stiffer and stronger than the stock case
- Precision machined for a superior surface finish
- Hard anodized to avoid marking or straining
IAG Stage X Complete Shortblock Includes:
- Case - WREJBB Billet / Sleeved Case Halves
- Fire-Lock - IAG Fire-Lock receiver groove machining, latest solution to prevent head gasket failure on high horsepower and high boost Subaru's - *IAG Fire-Lock head gaskets required and sold separately
- Machining - Machined for 14mm Head Studs *(Studs sold separately / Note the proper head gaskets or head gasket modifications are required for proper fitment with 14mm studs.
- Pistons – IAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Electro-nickel Plated Tops & Ring area, Ring Set, .250" / .927" H13 Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins)
- Connecting Rods – IAG-Spec +2mm Tri-Beam w/ ARP625+ Rod Bolts
- Rod/Main Bearings – ACL/King Race Bearings
- Crankshaft – Manley Billet Crank
- Case / Main Bolts – ARP Main Bolts
Power:
- The IAG Stage X Short Block has a power output rating of 1100+BHP.
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 Required:
- IAG Fire-Lock .051" Head Gaskets with IAG-Spec Alloy Ring Set - PN# IAG-ENG-1740
Additional Options Available:
- Head Studs - IAG / ARP Spec 14mm head studs, nuts, and washers required (Sold Separately)
- Oil Pump - Subaru JDM 12mm High Volume Oil Pump or 11mm Subaru Oil Pump (Sold Separately)
- Head Gaskets - IAG Fire-Lock .051" Head Gaskets with IAG-Spec Alloy Ring Set - Required for use with this short block (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-1611 |
Brand | IAG |
Shipping Weight | 40.0000kg |
Shipping Width | 0.800m |
Shipping Height | 0.200m |
Shipping Length | 0.800m |