Performance 600 Series FA20 DIT Long Block

The IAG Performance 600 Series FA20 DIT Long Block is a hand-built, valve cover-to-valve cover, timed crate engine specifically designed as a "drop-in" solution for 2015-2021 Subaru WRX models. This complete engine package simplifies installation and is engineered to reliably support up to 600 BHP. The foundation of this long block is the IAG 600 FA20F Short Block, constructed from new Subaru FA20 engine cases with modified oil passages for enhanced lubrication. Each case is precision bored and honed to 86.1mm for optimal piston-to-wall clearance, contributing to reduced engine noise and improved durability. Key internal components include a new 2015+ Subaru FA20 WRX crankshaft, ACL or King main bearings, IAG Spec H-Beam connecting rods with ARP2000 bolts, and IAG Spec JE FSR 86.1mm forged pistons. The cylinder heads are based on new AW20 WRX OEM castings, machined for performance with multi-angle valve jobs tailored for GSC valves. The valve train features Kelford dual cylindrical valve springs and new GSC Viton valve stem seals. The heads are assembled with OEM Subaru head gaskets and secured by 11mm ARP2000 head studs. Complementing the heads are Kelford 264-EZ camshafts, designed to enhance power across the rev range while maintaining driveability. Cam timing and valve lash are precisely set, and the engine ships fully assembled with OEM timing components. It supports up to 600 BHP and offers a reliable, high-performance upgrade or replacement engine for FA20F owners. The engine is compatible with 2015-2021 Subaru WRX models.