IAG 600 Street Cylinder Heads Package (Does NOT Include Kelford EZ Cams, Cam Towers, Lifters & Rockers) - 2015-2021 Subaru WRX / 2015-2016 STI

IAG 600 Street Cylinder Heads Package ENTRY-LEVEL OEM REPLACEMENT HEADS The IAG 600 Cylinder Heads serve as an entry-level alternative for stock OEM 2015-2021 Subaru WRX heads. Whether your engine has faced a catastrophic failure necessitating head replacement or you're starting without OEM heads, the IAG 600 Cylinder Heads offer an ideal solution. Capable of accommodating basic bolt-on upgrades up to 600 BHP, these heads feature upgraded GSC standard size valves, GSC Viton Valve Stem Seals, Kelford Valve Springs with Titanium Retainers, and OEM Keepers. Notably, FA20 heads differ in configuration from their EJ counterparts, with the casting divided into two parts: the "lower" and the "cam towers." The "Cam Towers" play a crucial role in securing the camshafts to the cylinder head. For those opting for Kelford EZ cams with IAG 600 Street Cylinder Heads, new OEM cam towers, rockers, pivots, and valve shim caps are included. BUILT WITH ALL-NEW COMPONENTS Every IAG 600 FA20 DIT Cylinder