his short block has a power output rating of 575BHP and will work well on your high. This short block features stronger connecting rods that are combined with forged pistons that are carefully assembled with a new 2017+ Subaru 2.5L Nitride treated STI crankshaft that is matched with ACL bearings. This is the IAG Performance Stage 2 Short Block. The unique inserts feature small passages that allow needed coolant flow to the deck surface. IAG Performance ARP 1/2' Head Stud Set for Subaru EJ20 EJ25 and FA20 DIT.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. IAG Performance / ARP 14mm Head Stud Set For Subaru WRX, STI, Legacy GT, Foreste. Includes (x4) M8 x 100mm Zinc Plated Socket Head Bolts (x4) M8 x 30mm Zinc Plated Socket Head Bolts (x8) M8 Washers Special Order Enquire ETA. Each guide is machined from a single piece of 6061.IAG Performance offers replacement hardware set for use with IAG EJ20 / EJ25 TGV's which are fitted to 3mm or 8mm thick phenolic spacers. $54.99 Quantity: The IAG Performance billet timing belt guide is the best method to prevent your EJ engine from skipping a beat. Includes (x4) M8 x 100mm Zinc Plated Socket Head Bolts (x4) M8 x 30mm Zinc Plated Socket Head Bolts (x8) M8 Washers IAG EJ25/EJ20 Timing Belt Guide. 051' Head Gaskets with IAG-Spec Alloy Ring Set PN# IAG-ENG-1745 Additional Attributes: GTIN: 00887753780836 Extened Information: IAG Performance offers replacement hardware set for use with IAG EJ20 / EJ25 TGV's which are fitted to 3mm or 8mm thick phenolic spacers. Compression Ratio: 8.5:1 on S20 Cylinder Heads (EJ20) Head Gasket Required: Note: IAG Fire-Lock. All IAG short blocks are balanced and blueprinted. The IAG Stage 4 Tuff Short Block has a power output rating of 1000BHP. Due to the larger size of the head studs, a greater load can be placed on the fasteners and in turn it aids in preventing cylinder heads from lifting in race applications. The IAG Performance 1/2 Inch Head Stud Set is manufactured by ARP and is designed for use on high horsepower Subaru EJ20, EJ25 and FA20 DIT engines.

Fits ALL turbo EJ20 Motors (with EJ20 OEM “Flat Bottom” “Single Scroll” Oil Pan) OEM Spec.

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