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 Head Set begins with pristine OEM castings sourced directly from Subaru of America. 

The new castings undergo meticulous visual inspection and disassembly before being securely fixtured in our state-of-the-art Newen Valve Guide and Seat Machine. Here, all intake and exhaust seats are precisely cut with a multi-angle valve job tailored to the flow characteristics of GSC's standard size 34mm Intake and 29mm Exhaust valves. Subsequently, the heads' decks are resurfaced to perfection using our advanced TS-3000 BlockMate, ensuring a flawlessly even finish on the aluminum. After undergoing ultrasonic cleaning to remove any residual debris and oils, the heads are meticulously reassembled using GSC Stainless Intake and Exhaust Valves, GSC Viton stem seals, Kelford Dual Valve Springs with Titanium Retainers, and OEM Valve Keepers.

IAG 600 Street Cylinder Head Package Includes:

• (x2) Brand New Subaru OEM WRX FA20 Cylinder Head Castings
• Multi-Angle Valve Job
• Resurface
• Ultrasonic Cleaning
• (x8) GSC 32mm (Standard) Intake Valves
• (x8) GSC 29mm (Standard) Exhaust Valves
• (x16) Kelford Dual Valve Springs & Titanium Retainers
• (x16) GSC Valve Stem Seals

NOTE: This Package does not include Kelford EZ Cams, Cam Towers, Lifters & Rockers