Sale Quick view IAG Performance IAG Single Valve Spring and Titanium Retainer Set For Subaru EJ Engine Availability: Usually Ships in 24 to 72 Hours $249.99 $212.49 The IAG Single Valve Spring & Titanium Retainer Set reduces valvetrain weight by up to 153.6g and increases spring pressure, which enables you to run increased boost and RPM over stock. The set works with all Subaru EJ20 and EJ25 engines and should... Add to Cart Add to Cart Add to Wish List Add to My Wish List Create New Wish List