IAG Magnum EJ25 Subaru Closed Deck Short Block for WRX STI LGT FXT. 2019-subaru-wrx sti-sport When a powerful STI launches

When a powerful STI launches aggressively at the track the output shaft progressively twists and weakens

Instead of having to purchase a new set of mounts if you want softer bushings

Intake Valve Diameter: 37

The Street Series AOS maintains OEM PCV system functionality

the heads are then fixtured in our Serdi 3

IAG Magnum EJ25 Subaru Closed Deck Short Block for WRX STI LGT FXT. 2019-subaru-wrx sti-sport When a powerful STI launchesIAG Magnum Subaru EJ25 Closed Deck Short Block The IAG Magnum Short Block starts with brand new Subaru 2. 5L engine case halves. 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 for our new Fire Lock head gasket