{"product_id":"arp-235-4320-black-oxide-pro-series-12-point-cylinder-head-stud-kit-for-big-block-chevrolet-with-brodix-sonny-leonard-14-5-degree-pb1200-heads-and-cast-iron-block","title":"ARP 235-4320 Black Oxide Pro Series 12-Point Cylinder Head Stud Kit for Big Block Chevrolet with Brodix Sonny Leonard 14.5 Degree\/PB1200 Heads and Cast Iron Block","description":"\u003cp\u003eFor good reason, virtually every top professional engine builder relies on ARP Pro Series head studs for their all-out competition powerplants.\u003c\/p\u003e\u003cp\u003eSimply stated, there's not a better stud setup on the market today.\u003c\/p\u003e\u003cp\u003eARP uses 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 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's 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 studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned—something that won't happen with inferior quality head studs.\u003c\/p\u003e\u003cp\u003eARP studs are thread rolled after heat-treat, which gives them about 1000% (that's 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's 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 more consistent clamping force—and one that compensates for head gasket compression when the cylinder heads are installed.\u003c\/p\u003e\u003cp\u003eThis helps prevent blown head gaskets and assures optimum engine sealing.\u003c\/p\u003e","brand":"ARP Inc.","offers":[{"title":"Default Title","offer_id":51709182116122,"sku":"ARP235-4320","price":342.08,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0975\/8942\/8506\/files\/617vCIJV73L_c5f1944d-19e5-43a5-aef4-1e3f5ba891d9.jpg?v=1771337465","url":"https:\/\/trybeepbeep.com\/products\/arp-235-4320-black-oxide-pro-series-12-point-cylinder-head-stud-kit-for-big-block-chevrolet-with-brodix-sonny-leonard-14-5-degree-pb1200-heads-and-cast-iron-block","provider":"TryBeepbeep","version":"1.0","type":"link"}