{"product_id":"550-street-cylinder-head-package","title":"550 Street Cylinder Head Package","description":"The IAG Performance 550 Street Cylinder Head Package serves as a robust entry-level replacement for OEM cylinder heads, ideal for catastrophic engine failures or as a foundation for performance builds. These heads are engineered to support vehicles with basic bolt-on modifications and aim for power levels up to 550 BHP.\n\nEach package starts with new Subaru OEM WRX or STI cylinder head castings. The machining process includes a multi-angle valve job, cam lobe clearance machining, deck resurfacing, and ultrasonic cleaning. Standard inclusions feature GSC 36mm intake valves, GSC 32mm exhaust valves, IAG Stage 1 valve springs with titanium retainers, and GSC Viton valve stem seals. An optional GSC S1 camshaft package is available, which includes OEM lifter buckets and a bench valve lash service.\n\nThese cylinder heads are intended for use with stock or mild duration camshafts. Professional installation is recommended, and the manufacturer's workmanship\/parts warranty is contingent upon professional installation. It is important to check and adjust the final valve lash once the heads are installed.","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":52688782098744,"sku":"IAG-ENG-H550SCL","price":5399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/664207861.webp?v=1784895845","url":"https:\/\/store.motormia.co\/products\/550-street-cylinder-head-package","provider":"MOTORMIA","version":"1.0","type":"link"}