The IAG 1000 FA24 Short Block combines top-tier components and cutting-edge technology to deliver the perfect balance of street reliability and track-level power. This ultimate "weekend racer" block is engineered to handle up to 1000 BHP and built to dominate in any setting. The IAG 1000 FA24 Short Block features +2mm IAG Spec H-Beam forged connecting rods, IAG-Spec JE Pistons with electroless nickel-plated coating and H13 tool steel wrist pins. The block is precision-machined to accommodate our venerable "Fire-Lock™" head gasket system and IAG 14mm head studs (sold separately). Each IAG 1000 short block is hand assembled using ACL rod and main bearings. The versatile IAG 1000 is the perfect setup that excels on the street, the drag strip and on the track. Our unique closed deck system significantly increases the strength of the OEM case halves. This process supports the cylinder walls at the top of the case in order to prevent flexing and possible cracking where the case bolt reliefs are cut into the back of the cylinder wall. During the installation process we machine the assembled case halves in our Haas VF-4SS CNC mill to accept the IAG Closed Deck inserts. Once the case has been machined we heat it in an oven while freezing the specially machined inserts with liquid nitrogen. The inserts are then pressed into place and then machined to a mirror finish. The unique inserts feature small passages that allow needed coolant flow to the deck surface. This means that the closed deck system does not affect the block's cooling ability and will not cause overheating, even in daily drivers.

IAG 1000 Closed Deck FA24 Short Block Includes: Case Halves -Brand new Subaru OEM case halves, Fire-Lock -IAG Fire-Lock™ receiver groove machining, latest solution to prevent head gasket failure on high horsepower and high boost Subaru's - IAG Fire-Lock™ head gaskets required, Head Studs -Machined for 14mm Head Studs, Pistons -IAG-Spec JE FSR 94.25mm 2618 Forged Pistons, Electroless Nickel Plated Tops & Ring area, JE Pro Seal Ring Set, .230" wall .866" H13 Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins), Connecting Rods -IAG-Spec +2mm H-Beam Forged Connecting Rods with ARP 625+ Rod Bolts., Rod / Main Bearings -ACL Bearings, Crank -FHI FA24 Heat-Treated Crankshaft, Case / Main Bolts -Standard FHI Subaru case bolts
,Compression Ratio: Calculated with fire-lock gaskets - 10.5:1