{"product_id":"arp-head-studs-part-no-204-4105","title":"ARP cylinder head studs for Audi 2.7L Bi-Turbo - 204-4105","description":"\u003cp\u003eThis ARP 204-4105 kit replaces the Audi 2.7L Bi-Turbo cylinder head bolts with studs. It is one of the first upgrades made to an engine that will have increased power, because the head gasket is one of the points that fails first.\u003c\/p\u003e\u003cp\u003eThey are manufactured from ARP2000, a proprietary alloy from ARP that reaches about 220,000 psi of tensile strength and maintains its properties better under heat than chrome-moly. Each stud is centerless-ground after heat treatment so that it remains perfectly concentric, ensuring the gasket and cylinder head are aligned, and the threads are rolled after heat treatment, which, according to ARP, multiplies fatigue resistance by twenty.\u003c\/p\u003e\u003cp\u003eRespect the torque and tightening sequence in the ARP instructions, which are calculated for their assembly lubricant; with engine oil, the actual torque changes. If you have questions about whether this is the correct part number for your engine, write to us with your engine code and year.\u003c\/p\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":53893665751374,"sku":"ARP-204-4105","price":687.68,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0816\/7329\/0062\/files\/204-4105.jpg?v=1790662679","url":"https:\/\/driftandgrip.com\/en\/products\/arp-head-studs-part-no-204-4105","provider":"Drift \u0026 Grip","version":"1.0","type":"link"}