Engines and Components Engines, Blocks and Components

IAG Performance

IAG Performance 550 Short Block Includes: Case Halves

$4,459.44

SKU: I00A IAG-ENG-S550

In Stock
In Stock
Ships by Jun 7
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Non-Returnable Item
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Description

The IAG Performance IAG-ENG-S550 is a 550BHP rated 2.5L Subaru Short Block designed for modified EJ25 Subaru engines. It features IAG-Spec JE 99.75mm Forged Pistons, IAG-Spec H-Beam Rods with ARP2000 bolts, and a new Subaru Nitride Treated 2017+ STI Crankshaft. Built with 100% new components, this short block is engineered to handle increased cylinder pressures and comes with a 12-month/12,000-mile workmanship warranty, extendable to 24-month/24,000-mile with certified installation and tune.

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandIAG Performance
Part NumberI00A IAG-ENG-S550

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Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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