{"product_id":"arp-triumph-tr4-12pt-head-stud-kit","title":"ARP Cylinder Head Studs for BMC 2.1L TR4, 12-pt Nuts","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e206-4207\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 672036020064\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eARP Cylinder Head Studs for 1961-1967 Triumph TR4\/TR4A BMC 2.1L, 12-pt Nuts\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eARP Pro Series cylinder head stud kit 206-4207 fits BMC 2.1L engines in 1961-1967 Triumph TR4 and TR4A models. These studs deliver consistent clamping force to maintain head gasket integrity under high compression and boost. Professional engine builders choose them for racing and street performance builds.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e8740 Chrome Moly Construction:\u003c\/strong\u003e High-strength alloy heat-treated to 190,000 PSI tensile strength for durability in demanding conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenterless Ground:\u003c\/strong\u003e Precision machining ensures concentricity so cylinder heads and gaskets align perfectly every time\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePost-Heat-Treat Thread Rolling:\u003c\/strong\u003e Increases fatigue strength by 2000% compared to pre-heat-treat threading for longer service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUndercut Design on Shorter Studs:\u003c\/strong\u003e Equalizes stretch across all studs for uniform clamping and resistance to gasket blowout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12-Point Nuts Included:\u003c\/strong\u003e Provide secure, high-torque fastening with black oxide finish for corrosion resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMPN 206-4207 made in USA for exact fit on BMC 2.1L TR4 engines\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish protects against rust in engine environments\u003c\/li\u003e\n\u003cli\u003ePackaged in protective ARP box measuring 11 x 7 x 1.5 inches\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003eApply ARP thread lubricant to studs and nuts for accurate torque\u003c\/li\u003e\n\u003cli\u003eCompatible with stock or performance head gaskets. torque to ARP specifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1961-1967\u003c\/td\u003e\n\u003ctd\u003eTriumph\u003c\/td\u003e\n\u003ctd\u003eTR4\u003c\/td\u003e\n\u003ctd\u003e2.1L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1965-1967\u003c\/td\u003e\n\u003ctd\u003eTriumph\u003c\/td\u003e\n\u003ctd\u003eTR4A\u003c\/td\u003e\n\u003ctd\u003e2.1L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose ARP?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eChoice of top professional engine builders in racing\u003c\/li\u003e\n\u003cli\u003ePremium alloys and processes exceed industry standards\u003c\/li\u003e\n\u003cli\u003eExact tolerances for flawless head installation and sealing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Which Triumph models does ARP 206-4207 fit?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Fits 1961-1967 TR4 and 1965-1967 TR4A with BMC 2.1L (2138cc) engines\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What material and strength rating?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e 8740 chromoly steel heat-treated to 190,000 PSI with black oxide finish\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What is the warranty and installation tip?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Limited warranty against manufacturing defects. use ARP lube and follow torque specs for best results\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS Ground or FedEx\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e In stock - ships same or next business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e ARP retail box 11 x 7 x 1.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":43555503145039,"sku":"ARP206-4207","price":147.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/arp-cylinder-head-studs-for-bmc-2_1l-tr4-12-pt-nuts-arp.jpg?v=1768370311","url":"https:\/\/www.blackopsautoworks.com\/products\/arp-triumph-tr4-12pt-head-stud-kit","provider":"Black Ops Auto Works","version":"1.0","type":"link"}