{"product_id":"arp-engine-head-stud-kit-190-4202","title":"ARP Engine Head Stud Kit 190-4202","description":"\u003cp\u003ePontiac 350-400-428-455 cid with D port heads (1967 later), 12-point nuts, ARP Head Studs 190-4202ARP Pontiac Head Studs Kits.\u003c\/p\u003e\u003cp\u003eVirtually every top professional engine builder relies on ARP head studs for their all-out competition powerplants.\u003c\/p\u003e\u003cp\u003eSimply stated, there is not a better stud setup on the market today.\u003c\/p\u003e\u003cp\u003eFor openers, ARP Pontiac Head Studs Kits use a premium grade 8740 alloy that is rated far superior to aircraft quality.\u003c\/p\u003e\u003cp\u003eEach stud is placed vertically in special racks and precisely heat-treated to 200,000 psi.\u003c\/p\u003e\u003cp\u003eThis procedure ensures complete heat penetration and the results are far superior to those lesser quality studs from other manufacturers who just dump pieces in a basket and hope for the best.\u003c\/p\u003e\u003cp\u003eFollowing heat-treat, each ARP Head Stud is centerless ground to make it as close to perfectly concentric as possible.\u003c\/p\u003e\u003cp\u003eThis procedure involves about ten very slight cuts and results in an exceptionally straight part.\u003c\/p\u003e\u003cp\u003eIt is important to note that lesser quality studs are not even centerless ground; the material is thread rolled in bar stock form (mostly before heat-treat, when the material is easier to machine).\u003c\/p\u003e\u003cp\u003eBecause ARP Pontiac Head Studs Kits are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned, something that will not happen with inferior quality head studs.\u003c\/p\u003e\u003cp\u003eARP Head Stud Kits are thread rolled after heat-treat, which gives them about 1000% (that is ten times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice).\u003c\/p\u003e\u003cp\u003eIt costs a lot more to do it this way, because it is tough on tooling, but the results are well worth the extra effort.\u003c\/p\u003e\u003cp\u003eYou will also note that ARP offers specially undercut studs for several engines.\u003c\/p\u003e\u003cp\u003eThis procedure (done only to the shorter studs) more equalizes the stretch of both studs, which makes for a.\u003c\/p\u003e","brand":"ARP Inc.","offers":[{"title":"Default Title","offer_id":51709130604826,"sku":"ARP190-4202","price":239.76,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0975\/8942\/8506\/files\/51q541luAiL_d950280b-9c5d-4b94-8674-ec156540265a.jpg?v=1771334286","url":"https:\/\/trybeepbeep.com\/products\/arp-engine-head-stud-kit-190-4202","provider":"TryBeepbeep","version":"1.0","type":"link"}