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IAG STAGE 2.5 FA20 SUBARU CLOSED DECK SHORT BLOCK FOR 2013+ BRZ / FR-S / 86 (12.5:1 COMPRESSION RATIO)

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IAG-ENG-1257
$5,699.99

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IAG STAGE 2.5 FA20 SUBARU CLOSED DECK SHORT BLOCK FOR 2013+ BRZ / FR-S / 86 (12.5:1 COMPRESSION RATIO)

AG Stage 2.5 FA20 Closed Deck Short Block


The IAG Stage 2.5 short block starts with new Subaru FA 2.0L BRZ engine case halves that are machined for improved oiling. Then 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 that 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 modified case halves are then 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 2.5 FA20 Includes:
  • Case Halves - Converted to Closed Deck using brand new Subaru OEM case halves
  • 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 2.5 Short Block has a power output rating of 675BHP 

Fitment-
13+ BRZ
13-16 FR-S

*All IAG Short Blocks are balanced and blueprinted. 

*Pictures used for marketing purposes only, actual product may vary 
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Returns Policy

Returns may be accepted within 14 days of purchase pending Return Merchandise Authorization (RMA). No returns or cancellations on special order items. All returns will be charged a 20% restocking fee, no exceptions.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. Item must be able to be resold as new. Several types of goods are exempt from being returned. Hazardous materials, fluids, greases, chemicals, and clothing are not able to return.

Free shipping is available within the lower 48 states for most orders totaling $199 or more. A free shipping option will be available during checkout. This offer is for delivery address in the continental United States and excludes shipments going to Alaska, Hawaii, Military Boxes, and items that require freight shipping.

Processing Time
Patterson Performance stocks a large quantity of items at any given time. Some items may require drop shipping from one of our various distributors. In stock items will ship within 1-2 business days. If you're needing your product quickly, please contact us to verify product availability before placing your order. Orders requiring additional verification (security concerns, incorrect information, etc.) may need additional processing time. Estimated shipping dates are not guaranteed and are subject to change based on inventory levels and manufacturer lead times. Backordered items are shipped immediately once available.

Items ship daily, If the item you ordered is not in stock, a member of our team will contact you via email / phone.

Patterson Performance will only ship to an address that varies from your billing address if payment is made via Paypal or a financing partner.

Patterson Performance ships from multiple warehouses throughout the United States, and sometimes from manufacturers overseas.

You can simply contact us via email / telephone for a live inventory check

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