IAG 950 Closed Deck Long Block Engine

The IAG Performance 950 Closed Deck Long Block Engine is a complete, valve cover to valve cover, crate engine designed for high horsepower applications (up to 950 BHP). It features a new EJ20 or EJ25 Subaru case converted to closed deck with IAG's proprietary insert system, bored and honed to 92.5mm or 99.75mm. The block is machined for 14mm head studs and incorporates the Fire-Lock™ head gasket system. The rotating assembly includes IAG-Spec JE FSR 2618 forged pistons, .250" / .906" H13 wrist pins, IAG-Spec Tuff H-Beam +2mm connecting rods with ARP 625+ rod bolts, and an OEM STI crankshaft. The engine is paired with IAG 950 Fully CNC Ported Race Cylinder Heads, which are new Subaru OEM castings with CNC machined intake and exhaust ports, +1mm oversized GSC SuperAlloy intake and exhaust valves, IAG Beehive Springs, and GSC Billet Stage 2 camshafts.