IAG 550 Street Cylinder Heads Package for 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT

This is the street-friendly EJ head package for builds that need a fresh set of assembled heads without jumping straight into an all-out race setup.

• What you get: Assembled street heads with upgraded valvetrain and chambers set up for a solid pump gas or flex fuel performance build
• Best fit: Great match for daily driven or weekend cars where you want better reliability and flow without overbuying
• Power level: Built around the 550 package level so it makes sense on moderate power builds

Fitment: 2002-14 WRX, 2004-21 STI, 2005-09 Legacy GT, 2004-13 Forester XT

Why you'd choose it: Choose this when you want a complete assembled head package that is easier to justify than the higher-port race options but still a real step up from stock.