IAG 600 FA20 DIT Subaru Short Block for 2015-21 WRX – 600 BHP

IAG 600 FA20 DIT Short Block – High-Strength Bottom End for Subaru WRX

DESIGNED FOR STRENGTH

The IAG 600 FA20 DIT Short Block is engineered for stock or modified 2015–2021 Subaru WRX vehicles that need a stronger bottom end to support increased cylinder pressures created by additional boost. This short block features IAG Spec H-Beam forged connecting rods and race bearings capable of handling greater engine loads than the stock rods and pistons. :contentReference[oaicite:0]{index=0}

BUILT WITH 100% NEW COMPONENTS

Each IAG 600 Short Block starts with brand new FA20 DIT Subaru 2.0L engine case halves that are bored and honed to 86.25 mm. A new 2015+ Subaru FA20 crankshaft is matched to ACL or King race main bearings, and the case halves are sealed with new OEM main case bolts and sealant. The IAG Spec H-Beam connecting rods with ARP2000 rod bolts and ACL or King race rod bearings provide the strength needed for high-boost applications.

MODIFIED OIL PASSAGES FOR IMPROVED OILING

Adequate oil flow is critical to performance and reliability. IAG carefully inspects and modifies the internal oil passages of each new OEM case to ensure proper flow and engine longevity under higher loads.

FORGED PISTONS, DESIGNED FOR BOOST

The short block features IAG Spec JE FSR 86.25 mm forged pistons made from high-strength 2618 T6 alloy. These pistons are designed to support increased cylinder pressures associated with higher boost levels. The asymmetrical skirt design reduces weight while maintaining strength and promoting excellent combustion characteristics. Forged pistons are secured to the rods with .150" x 2.250" carbon steel wrist pins.

IAG 600 FA20 DIT SHORT BLOCK INCLUDES

• Case Halves – Brand new OEM Subaru FA20 case halves, bored and honed to 86.25 mm
• Case Machining – Modified for improved oiling and reliability
• Pistons – IAG-Spec JE FSR 86.25 mm forged pistons with ring set and wrist pins
• Connecting Rods – IAG Spec H-Beam with ARP2000 rod bolts
• Rod / Main Bearings – ACL or King race bearings
• Crankshaft – New Subaru FA20 DIT WRX crankshaft
• Case / Main Bolts – Standard Subaru case bolts
• Hardware – OEM oil plug pre-installed at the oil pan location

COMPRESSION RATIO

• 10.5:1 compression on standard gasket thickness

POWER RATING

• Rated for up to 600 BHP

Please Note: This item is not eligible for standard ground shipping and must be delivered via freight. 
STOCK NOTICE: This item is built to order and carries a minimum 6-8 week build time.

IMPORTANT DELIVERY NOTE: Your order is shipping Via Truck Freight which requires you to be available at the time of receipt. There is a possibility the trucking company will try to schedule a delivery time with you. At the time of delivery, the driver will hand you the delivery receipt also referred to as the bill of lading, you will use this to notate any damages to the shipment. It is important that you fully inspect the shipment from all sides and notate any dents, punctures or rips in the outside packaging on the delivery receipt. Once you've inspected your shipment from the outside, you will need to open it and check the product in its entirety for damages and notate them if any. If there is no damage sign for the package and enjoy! In the rare case, you do find that your order arrived with damages, it is important you follow these steps. - Do not refuse the product- Document the damages in as much detail as possible on the Bill of Lading
- Take numerous photos from all angles (including packaging)
- Keep the product and contact the shipping company to start the damage claim
- Contact us either by phone or email for the next steps In the situation where the delivery driver is unable to wait for you to open and inspect your product, simply document "driver was unable to wait for inspection." All damage must be noted on the Bill of Lading before signing and initiating a damage claim. If the damage is not notated before signing for the item it is assumed to be in good condition. This will forfeit the ability for a shipping claim and you will not be eligible for refund or replacement.