Images May Not be Vehicle Specific. For Display Purposes Only.

IAG Subaru Staged Short Blocks UNIVERSAL

Brand: IAG Performance | Category: Engine Blocks
These parts should fit your vehicle, they are universal parts. Click a part number for more information.
UNIVERSAL
IAG-ENG-1000 IAG Stage 1 2.5L Subaru Short Block For WRX, STI, Legacy GT & Forester XT
1. Pistons Manley 99.5mm Platinum Series Pistons, Ringset, Tool Steel Pins and Clips (w/ Coated Skirts and Offset Wrist Pin)
2. Case Halves New FHI Subaru Case Halves at 99.5mm (Stock Bore)
3. Rods New FHI Subaru Early STI (Stronger Style) Connecting Rods
4. Crankshaft New FHI Subaru Heat Treated 2012+ STI Crankshaft
4. Rod Bearings ACL or King Rod Bearings
6. Main Bearings ACL or King Main Bearings
7. Case Bolts New FHI Main Case Bolts
8. Spec Sheet IAG Spec Blueprint Sheet
9. Power Rating Power Output Rating: 475BHP
IAG-ENG-1001 IAG Stage 1 Plus 2.5L Subaru Short Block for WRX, STI, Legacy GT, Forester XT
1. Pistons Manley 99.75mm Platinum Series Pistons, Ringset, Tool Steel Pins and Clips (w/ Coated Skirts and Offset Wrist Pin)
2. Case Halves New FHI Subaru Case Halves at 99.75mm
3. Rods New FHI Subaru Early STI (Stronger Style) Connecting Rods
4. Crankshaft New FHI Subaru Heat Treated 2012+ STI Crankshaft
5. Rod Bearings ACL or King Rod Bearings
6. Main Bearings ACL or King Main Bearings
7. Case Bolts New FHI Main Case Bolts
8. Spec Sheet IAG Spec Blueprint Sheet
9. Power Rating Power Output Rating: 475BHP
IAG-ENG-1200 IAG Stage 2 2.5L Subaru Short Block for WRX, STI, Legacy GT, Forester XT
1. Pistons Manley 99.5mm Platinum Series Pistons, Ringset, Tool Steel Pins and Clips (w/ Coated Skirts and Offset Wrist Pin)
2. Case Halves New FHI Subaru Case Halves at 99.5mm (Stock Bore)
3. Rods Brian Crower Sportsman H-Beam Forged Connecting Rods w/ ARP2000 Rod Bolts
4. Crankshaft New FHI Subaru Heat Treated 2012+ STI Crankshaft
5. Rod Bearings ACL or King Rod Bearings
6. Main Bearings ACL or King Main Bearings
7. Case Bolts New FHI Main Case Bolts
8. Spec Sheet IAG Spec Blueprint Sheet
9. Power Rating Power Output Rating: 650BHP
IAG-ENG-1211 IAG Stage 2 Tuff 2.5L Subaru Short Block for WRX, STI, Legacy GT, Forester XT
01. Pistons Manley 99.75mm Platinum Series Pistons, Ringset, Tool Steel Pins and Clips (w/ Coated Skirts and Offset Wrist Pin)
02. Case Halves New FHI Subaru Case Halves at 99.5mm (Stock Bore)
03. Rods Manley H-Tuff Forged Connecting Rods w/ ARP Rod Bolts (Heavier Version of H-beam Rods)
04. Crankshaft New FHI Subaru Heat Treated 2012+ STI Crankshaft
05. Rod Bearings ACL or King Rod Bearings
06. Main Bearings ACL or King Main Bearings
07. Case Bolts New FHI Main Case Bolts
08. Spec Sheet IAG Spec Blueprint Sheet
09. Hone IAG Spec Bore and Hone (Performed on our in house Sunnen SV-10)
10. Tighter Clearance Tighter piston to wall clearance for quiet operation
11. Power Rating Power Output Rating: 675BHP
IAG-ENG-1250 IAG Stage 2.5 EJ25 Subaru Closed Deck Short Block For WRX, STI, LGT, FXT
01. Pistons Manley 99.75mm Platimum Forged Pistons / .170 inch wall tool steel wrist pins
02. Case Halves Converted to Closed Deck using brand new Subaru OEM case halves, bored and honed to 99.75mm
03. Rods Manley H Tuff / ARP2000 Rod Bolts
04. Crankshaft New FHI Subaru Heat Treated 2012+ STI Crankshaft
05. Rod Bearings ACL or King Rod Bearings
06. Main Bearings ACL or King Main Bearings
07. Case Bolts New FHI Main Case Bolts
08. Spec Sheet IAG Spec Blueprint Sheet
09. Hone IAG Spec Bore and Hone (Performed on our in house Sunnen SV-10)
10. Tighter Clearance Tighter piston to wall clearance for quiet operation
11. Power Rating Power Output Rating: 675BHP

Product Description

IAG Staged short blocks are the best way to upgrade the weak components of your motor and get the most out of your Subaru. Each Stage package ups the power handling abilities and the components involved. Choose the motor that best suits your needs, make sure you give us a call at 412.777.9661 if you have any questions about the details of a Staged Block from IAG.

All motors are built to order so expect 2-3 weeks for delivery.

———————————————————————————————————————————————————————-

IAG Stage 1 Short Block

The IAG Stage 1 Short Block is perfect for lightly modified EJ25 Subaru’s that need a basic and reliable performance short block. Subaru turbo engines are commonly known for piston ring land failures and if gone unchecked lead to rod knock and total engine failure due to oil starvation from blow by. IAG’s Stage 1 Short Block includes upgraded forged pistons along with performance main and rod bearings that replace the OEM components that are prone to common failure on Stage 2 and up vehicles. Each IAG Stage 1 Short Block starts with new Subaru 2.5L 99.5mm bore EJ25 engine case halves as standard. The short block is measured and assembled using a new 2012+ Heat Treated Subaru 2.5L STI crankshaft that is matched to ACL or King main bearings. Early style OEM STI rods are utilized along with ACL or King rod bearings. The case halves are sealed with new OEM case bolts and sealant. Finally Manley 99.5mm Platinum Series Forged Pistons are spec’d and installed finishing off the short block.

The IAG Stage 1 Short Block has a power output rating of 475BHP.

*All IAG short blocks are balanced and blueprinted.

Compression Ratio: 8.5:1 on D Cylinder Heads (EJ255)
Compression Ratio: 8.2:1 on B, V and W EJ257 Heads with standard thickness gasket.

———————————————————————————————————————————————————————-

IAG Stage 1 Plus Short Block

The IAG Stage 1 Plus short block starts with new Subaru 2.5L EJ25 engine case halves that are bored and honed to 99.75mm on our in house Sunnen SV-10. IAG‘s in house honing process is able to set piston to wall clearances tighter for a quieter running engine. The short block is measured and assembled using a new 2012+ Subaru 2.5L heat-treated STI crankshaft that is matched to ACL Race or King main bearings. Early style OEM STI rods are utilized along with ACL or King rod bearings. The case halves are sealed with new OEM case bolts and sealant. Finally Manley 99.75mm Platinum Series Forged Pistons are spec’d and installed finishing off the short block.

The IAG Stage 1 Plus Short Block has a power output rating of 475BHP.

*All IAG Short Blocks are balanced and blueprinted.

Compression Ratio: 8.5:1 on D Cylinder Heads (EJ255)
Compression Ratio: 8.2:1 on B, V and W EJ257 Heads with standard thickness gasket.

———————————————————————————————————————————————————————-

IAG Stage 2 Short Block

The IAG Stage 2 Short Block is designed for modified EJ25 Subaru’s that need a beefed up performance short block. The IAG Stage 2 short block builds on the Stage 1’s strengths by adding ACL Race bearings and Brian Crower Sportsman H-Beam forged connecting rods. The upgraded rods and bearings are able to support additional engine load produced by larger turbochargers that the OEM STI rods cannot support reliably. Each IAG Stage 2 Short Block starts with new Subaru 2.5L 99.5mm stock bore EJ25 engine case halves as standard. The short block is measured and assembled using a new 2012+ Subaru 2.5L heat-treated STI crankshaft that is matched to ACL or King race main bearings. Brian Crower Sportsman H-Beam rods and ARP2000 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. Finally Manley 99.5mm Platinum Series Forged Pistons are spec’d and installed finishing off the short block.

The IAG Stage 2 Short Block has a power output rating of 650BHP.

*All IAG Short Blocks are balanced and blueprinted.

Compression Ratio: 8.5:1 on D Cylinder Heads (EJ255)
Compression Ratio: 8.2:1 on B, V and W EJ257 Heads with standard thickness gasket.

———————————————————————————————————————————————————————-

IAG Stage 2 Tuff Short Block

The IAG Stage 2 Tuff short block starts with new Subaru 2.5L EJ25 engine case halves that are bored and honed to 99.75 on our in house Sunnen SV-10. IAG’s in house honing process is able to set piston to wall clearances tighter for a quieter running engine. The short block is measured and assembled using a new 2012+ Subaru 2.5L heat-treated STI crankshaft that is matched to ACL or King race main bearings. Next Manley H-Tuff forged rods with ARP Rod Bolts are utilized to increase the power rating slightly at the expense of being heavier. The connecting rods are matched to ACL or King race rod bearings. The case halves are sealed with new OEM main case bolts and sealant. Finally Manley 99.75mm Platinum Series Forged Pistons are spec’d and installed finishing off the short block.

The IAG Stage 2 Tuff Short Block has a power output rating of 675BHP.

*All IAG short blocks are balanced and blueprinted.

Compression Ratio: 8.5:1 on D Cylinder Heads (EJ255)
Compression Ratio: 8.2:1 on B, V and W EJ257 Heads with standard thickness gasket.

———————————————————————————————————————————————————————-

IAG Stage 2.5 Subaru EJ25 Closed Deck Short Block

The IAG Stage 2.5 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. Next the short block is Deck Plate bored and honed to 99.75mm in our in-house Sunnen SV-10. 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 2012+ Subaru 2.5L heat-treated STI crankshaft that is matched to ACL or King race main bearings. Manley H Tuff 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 (upgrading to ARP mains requires line honing). Manley Spec 99.75mm Platinum Forged Pistons are chosen to finish the Stage 2.5 short block.

Stage 2.5 Closed Deck Includes:
Case Halves – Converted to Closed Deck using brand new Subaru OEM case halves, bored and honed to 99.75mm.
Pistons – Manley 99.75mm Platimum Forged Pistons / .170 inch wall tool steel wrist pins
Connecting Rods – Manley H Tuff / ARP2000 Rod Bolts.
Rod / Main Bearings – ACL or King Race bearings.
Crankshaft – Standard New Subaru Heat-Treated 2012+ STI Crankshaft.
Case / Main Bolts – Standard FHI Subaru case bolts.

Additional Options Available:
Oil Pump – ACL Orbit High Volume Oil Pump – $249 or 11mm Subaru Oil Pump – $185.95
Rod Bolts – 625+ ARP rod bolts – $200
Wrist Pins – Upgrade to Extreme .210 inch 9310 thick-wall wrist pins – $100
Head Gaskets – JE Pro Seal .039 inch Head Gaskets – $96 or Cosworth 1.1mm Head Gaskets- $158
Hardware / Seal Option – $99.99 (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 for B and D casting cylinder heads.
*IAG Recommends Cosworth 1.1mm head gaskets for all V and W casting cylinder heads.

The IAG Stage 2.5 Short Block has power output rating of 700BHP.

*All IAG short blocks are balanced and blueprinted.

Product Reviews

Be the first to review this item.

Rating
Title
Review