IAG Stage 2 FA20 Short Block
The IAG Stage 2 short block starts with new Subaru FA 2.0L BRZ engine case halves that are machined for improved oiling. Then the case is bored and honed to 86.25mm on our in-house Sunnen SV-30 the most advanced automotive cylinder hone available. 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 FA20 WRX / BRZ Subaru crankshaft that is matched to King main bearings. Brian Crower H-Beam rods with ARP2000 rod bolts are utilized along with King or ACL rod bearings. The case halves are sealed with new OEM case bolts and sealant. Finally, standard compression IAG-Spec 86.25mm 12.5:1 compression ratio forged pistons are spec'd and installed along with an OEM oil plug finishing off the short block.
Stage 2 FA20 Includes:
- Case Halves - Brand new OEM Subaru BRZ FA20 case halves, bored and honed to 86.25mm
- Case Machining - Modified for improved oiling
- Case Machining - Bored and honed to 86.25mm
- Pistons - IAG-Spec 86.25mm 12.5:1 Forged Pistons, Ring Set, and 1.50" x 2.250" Chromoly Wrist Pins
- Connecting Rods - Brian Crower H-Beam / ARP2000 Rod Bolts
- Rod Bearings - ACL or KING XPG
- Main Bearings - King XPG
- Crankshaft - New Subaru FA20 WRX / BRZ crankshaft
- Case / Main Bolts - Standard Subaru case bolts
- Hardware - OEM Oil Plug - preinstalled at the oil pan location.
Additional Options Available:
- Oil Plugs & Rear Main Seal - (x2) 11024AA141 Plug, (x1) 806792010 Rear Main Seal - $34.99
Compression Ratio:
- 12.5:1 (Standard Compression) on standard gasket thickness.
Power: The Stage 2 Short Block has a power output rating of 600BHP
*All IAG Short Blocks are balanced and blueprinted. This short block features a lower compression and is intended for forced induction applications.
Please review the PDF document below regarding installation, break-in procedures and warranty information.
 PDF After Sale Document - Contains Shipping, Engine Care and Warranty Information
 WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and reproductive harm. For more information, visit www.P65Warnings.ca.gov.
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IAG SHORT BLOCK WARRANTY INFORMATION, TERMS & CONDITIONS
IAG Performance is confident in our products and services and we proudly stand behind our workmanship. Starting from the date of delivery, IAG Performance offers a 12 month / 12,000 mile warranty on every engine built at our facility. If there is an issue with the engine that was due to an error on our behalf during the machining, assembly, or in-house installation process, you will be covered.
IAG Short Block Warranty Limitations are as follows:
1. Warranty applies only to short block components manufactured and assembled by IAG Performance.
2. Warranty does not extend to any other part of the engine, turbocharger, accessories, or vehicle in which the engine is installed.
3. Warranty coverage excludes any and all labor expenses related to engine removal and replacement, as well as any shipping costs incurred.
4. Warranty coverage excludes any and all labor expenses or components (i.e. gaskets, fluids, etc.) needed for reassembly and reinstallation.
5. Warranty is only offered if the short block is professionally installed, with receipts provided.
6. Warranty is non-transferrable and only offered to the original purchaser of the engine.
7. All parts used in the assembly of the IAG build short block carry the manufacturer’s individual component warranties. No warranty is expressed nor implied for any customer-supplied components.
8. Customer is responsible for initiating a warranty claim with IAG directly.
9. Customer is responsible for any and all shipping, transportation and handling costs to return the engine to our facility.
10. The customer will be held responsible for all engine tear down costs for claims deemed insufficient and/or invalid.
11. Proof of proper maintenance is the owner’s responsibility.
IAG Short Block Warranty does NOT cover:
Engine damage or failure incurred by improper installation, improper or insufficient break-in, improper or inadequate tuning, overly aggressive or dangerous tuning parameters, user negligence, improper or inadequate maintenance, failure to maintain proper type and level of fluids, fuel, oil and lubricants, abuse, alteration, over-rev, overheat, detonation, hydro-lock, short block and cylinder head casting flaw or failure, oil starvation, fuel starvation, normal wear and tear maintenance items, accident damage, foreign object ingestion, etc.
Warranty is also void if bearing-related failure occurs and proof of oiling component replacement cannot be provided. Oiling components may include oil pump, oil cooler, oil pick up, oil pan, oil-driven AVCS cam gears, screened banjo bolts and all other oiling related components depending on the model year and layout of the vehicle. Keep all receipts and be prepared to make them available if questions arise about maintenance. Proof of proper maintenance is the owner’s responsibility.
Model Year & Fitment
- 2013 Subaru BRZ / FR-S
- 2014 Subaru BRZ / FR-S
- 2015 Subaru BRZ / FR-S
- 2016 Subaru BRZ / FR-S
- 2017 Subaru BRZ / FR-S
- 2018 Subaru BRZ / FR-S
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