IAG Stage 3 Extreme FA20 Closed Deck Short Block
The IAG Stage 3 Extreme 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. The case halves are then CNC machined with O-ring receiver grooves around the bore surface as well as drilled and tapped to accept 1/2" head studs that greatly reduce head gasket failure during high cylinder pressure scenarios. 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. Manley I-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, lower compression IAG-Spec 86.25mm 10.5:1 compression ratio forged pistons are spec'd and installed along with an OEM oil plug finishing off the short block. The lower compression ratio is good for BRZ / FR-S forced induction conversion applications.
Stage 3 Extreme 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
- O-Ringing - Machine and O-Ring Deck Surface
- Head Studs - Machine Case for 1/2" head studs - *Head studs are sold separately.
- Pistons - IAG-Spec 86.25mm 10.5:1 Forged Pistons, Ring Set, and 1.50" x 2.250" Chromoly Wrist Pins
- Connecting Rods - Manley I-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
- Head Studs - IAG Performance 1/2" head stud set manufactured by ARP - $499.99
- 10.5:1 (2.0 lower than stock compression) on standard gasket thickness.
Power: The Stage 3 Extreme Short Block has a power output rating of 800BHP
*All IAG Short Blocks are balanced and blueprinted. This short block features a lower compression and is intended for forced induction applications.
*Pictures used for marketing purposes only, actual product may vary
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.
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.
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