{"product_id":"arp-bmc-a-series-main-stud-kit","title":"ARP BMC A Series Main Stud Kit","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e206-5401\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 672036008017\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eARP Pro Series Main Stud Kit for BMC A-Series Engines 1958-1980 Mini Cooper Sprite Midget\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe ARP 206-5401 main stud kit upgrades crankshaft retention in all BMC A-Series engines including 948cc 997cc 1098cc 1275cc and 1293cc variants found in Mini Cooper Austin Healey Sprite MG Midget and Morris Minor. These 8740 chrome-moly studs deliver 190,000 psi tensile strength with black oxide finish for precise clamping force and alignment under high-RPM street race and rally loads. Precision-ground and heat-treated with rolled threads this kit replaces factory bolts directly without block modifications.\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 190,000 psi tensile strength holds crankshaft securely during extreme high-RPM operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack Oxide Finish:\u003c\/strong\u003e Rolled threads after heat treatment resist fatigue and protect against corrosion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Hardware:\u003c\/strong\u003e Parallel-ground washers and 12-point nuts distribute load evenly across all five main caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt-In Fitment:\u003c\/strong\u003e Direct replacement for factory main bolts in stock or modified A-Series blocks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Kit:\u003c\/strong\u003e 10 studs 10 washers and 10 nuts cover full engine installation needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFits all BMC A-Series engines 948cc to 1293cc\u003c\/li\u003e\n\u003cli\u003eTorque to 65 ft-lbs with ARP Ultra-Torque lube\u003c\/li\u003e\n\u003cli\u003eShips in protective retail box\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\u003eUse ARP Ultra-Torque lube on threads and under nut faces.\u003c\/li\u003e\n\u003cli\u003eTorque in 3 steps to 65 ft-lbs check main bearing clearance after install.\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\u003e1958-1971\u003c\/td\u003e\n\u003ctd\u003eAustin Healey\u003c\/td\u003e\n\u003ctd\u003eSprite\u003c\/td\u003e\n\u003ctd\u003eMKI MKII MKIII MKIV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1961-1979\u003c\/td\u003e\n\u003ctd\u003eMG\u003c\/td\u003e\n\u003ctd\u003eMidget\u003c\/td\u003e\n\u003ctd\u003eMKI MKII MKIII\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1959-2000\u003c\/td\u003e\n\u003ctd\u003eMini\u003c\/td\u003e\n\u003ctd\u003eCooper\u003c\/td\u003e\n\u003ctd\u003eA-Series All\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1959-1980\u003c\/td\u003e\n\u003ctd\u003eMorris\u003c\/td\u003e\n\u003ctd\u003eMini\u003c\/td\u003e\n\u003ctd\u003eA-Series All\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1963-1971\u003c\/td\u003e\n\u003ctd\u003eMorris\u003c\/td\u003e\n\u003ctd\u003eMinor\u003c\/td\u003e\n\u003ctd\u003e1000 Series\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\u003eOver 60 years of championship-winning fastener engineering\u003c\/li\u003e\n\u003cli\u003eTrusted by every major race series worldwide\u003c\/li\u003e\n\u003cli\u003eLimited lifetime warranty\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 Fits 1275cc Cooper S?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes fits all BMC A-Series engines 948cc to 1293cc including Cooper S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Material and torque spec?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e 8740 chrome-moly studs torque to 65 ft-lbs with ARP Ultra-Torque lube\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Reusable after install?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes if undamaged and threads measure within ARP specifications\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 or FedEx Ground\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 Protective retail box 8 x 6 x 1.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":43916946407503,"sku":"ARP206-5401","price":42.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/arp-bmc-a-series-main-stud-kit-arp.jpg?v=1768371088","url":"https:\/\/www.blackopsautoworks.com\/products\/arp-bmc-a-series-main-stud-kit","provider":"Black Ops Auto Works","version":"1.0","type":"link"}