IAG 550 Long Block Engine Oil Pump

The IAG Performance 550 Long Block Engine is a complete, valve cover-to-valve cover crate engine designed for modified EJ25 Subarus. It features a brand new EJ25 Subaru case, 99.5mm IAG-Spec JE forged pistons with an asymmetrical skirt design, and IAG Spec H-Beam connecting rods. The engine also includes a new 2017+ Subaru 2.5L nitride treated STI crankshaft, ACL or King race main and rod bearings, and an 11mm ARP 2000 head stud set. The IAG 550 Cylinder Head package utilizes OEM Subaru WRX STI castings with GSC valvetrain components, including standard size intake and exhaust valves, Stage 1 valve springs with titanium retainers, and GSC S1 camshafts.