The perfect solution to solving your headgasket failure woes. This is a complete set of our remanufactured 2.5L Subaru DOHC cylinder heads. These will work with your 08-19 WRX STI (with dual avcs) engines with a W25 casting (verify your fitment). These are a full overhaul of your supplied cores.
 
What's Included:
Reconditioned factory cylinder head castings (ultrasonic washed, wet media blasted)
Marshall Motorsports proprietary 3 angle valve job (seats and valve faces)
Cylinder Head resurfacing to a 20 RA finish
New OEM Valve guides (honed to proper valve clearance)
New Viton valve stem seals
OEM springs and retainers (ultrasonic washed and pressure tested)
OEM camshafts (ultrasonic washed and specd)
 
All cylinder heads are triple checked for flatness and vaccum seal tested before being packaged and shipped out. Lash is set during assembly and non adjustable.
 
Stage 1 - Stock Rebuild
Stage 2 - GSC Internals: Valves (Stock Size), Valve Guides, Springs / Retainers, Titanium Keepers
Stage 3 - Stage 2 + BC Camshaft upgrade
 
 
 
*Your cores are required for rebuilding* *pricing does not include freight*