Cylinder Head Packages

Shop complete Subaru cylinder head packages at IAG Performance for WRX, STI, Legacy GT, and Forester XT models, including our IAG Street, Competition, Race, and Drag series CNC-ported heads. These ready-to-install packages take the guesswork out of building heads matched to your power goals, with each tier progressively ported and assembled to suit street, competition, race, or all-out drag use