{"product_id":"arp-head-studs-part-no-231-4701","title":"ARP Cylinder Head Studs for GM 2.2L Ecotec - 231-4701","description":"\u003cp\u003eARP cylinder head stud kit for the GM 2.2L Ecotec, part number 231-4701. It replaces the stock head bolts with studs and nuts, a solution that distributes the load better across the gasket and avoids damaging the block threads every time the cylinder head is removed.\u003c\/p\u003e\u003cp\u003eThey are manufactured from 8740 chrome-moly steel, heat-treated in-house by ARP to a tensile strength of approximately 190,000 psi. ARP grinds each stud after heat treatment to ensure it is straight and concentric, and rolls the threads at the end of the process; this achieves a fatigue strength about twenty times greater than that of a thread cut before heat treatment.\u003c\/p\u003e\u003cp\u003eFollow the torque specifications and tightening sequence in the ARP instructions, which are calculated for their assembly lubricant; using engine oil will change the actual torque. Before ordering, confirm your engine code; if you are unsure, we can help you verify it.\u003c\/p\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":53894475120974,"sku":"ARP-231-4701","price":268.21,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0816\/7329\/0062\/files\/231-4701.jpg?v=1790662303","url":"https:\/\/driftandgrip.com\/en\/products\/arp-head-studs-part-no-231-4701","provider":"Drift \u0026 Grip","version":"1.0","type":"link"}