{"product_id":"arp-ford-modular-v8-main-cap-side-bolt-early-cast-iron-block-m8-main-bolt-kit","title":"ARP Main Stud Kit for Ford Side bolts - Early cast iron block M8","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e156-5201\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 672036037727\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eARP Main Stud Kit for Ford 289\/302\/351W Early Cast Iron Block M8 Side Bolts\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eARP 156-5201 main stud kit secures main caps in Ford 289 302 and 351W engines with early cast iron blocks and M8 side bolts found in vehicles from 1962 to 1995. This kit delivers consistent clamping force to handle high horsepower builds in classic Mustangs trucks and vans. It stops main cap walk eliminates fretting and shields block threads from damage for long-term engine reliability.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e8740 Chrome Moly Steel:\u003c\/strong\u003e In-house heat-treated to 190,000 PSI tensile strength for unmatched holding power under extreme loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRolled J-Form Threads:\u003c\/strong\u003e Formed after heat treatment creating threads 2000% stronger than cut threads for superior fatigue resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Hardware Set:\u003c\/strong\u003e Includes hardened parallel-ground washers and heavy-duty nuts for precise even load distribution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCap Walk Prevention:\u003c\/strong\u003e Locks main caps in place during high-rpm operation and boosted applications preventing misalignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlock Thread Protection:\u003c\/strong\u003e Stud design reduces galling and stripping risks for easier installs and rebuilds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVerify engine block has M8 x 1.25 side bolts typical on pre-1970 Windsor cast iron blocks.\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish resists corrosion in harsh engine environments.\u003c\/li\u003e\n\u003cli\u003eMade in USA with meticulous quality checks for every component.\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\u003eChase block threads with ARP tap set and use ARP moly lube on studs.\u003c\/li\u003e\n\u003cli\u003eTorque mains to 85-110 ft-lbs in sequence per ARP instructions included.\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\u003e1962-1971\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eFairlane\u003c\/td\u003e\n\u003ctd\u003eEarly Cast Iron Block M8 Side Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1964-1973\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eMustang\u003c\/td\u003e\n\u003ctd\u003eEarly Cast Iron Block M8 Side Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1966-1970\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eFalcon\u003c\/td\u003e\n\u003ctd\u003eEarly Cast Iron Block M8 Side Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1966-1977\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eBronco\u003c\/td\u003e\n\u003ctd\u003eEarly Cast Iron Block M8 Side Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1967-1983\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-100\u003c\/td\u003e\n\u003ctd\u003eEarly Cast Iron Block M8 Side Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1967-1983\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-150\u003c\/td\u003e\n\u003ctd\u003eEarly Cast Iron Block M8 Side Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1968-1982\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eEconoline\u003c\/td\u003e\n\u003ctd\u003eEarly Cast Iron Block M8 Side Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1968-1976\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eTorino\u003c\/td\u003e\n\u003ctd\u003eEarly Cast Iron Block M8 Side Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1969-1979\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eRanchero\u003c\/td\u003e\n\u003ctd\u003eEarly Cast Iron Block M8 Side Bolts\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\u003eTrusted by racers since 1968 in demanding motorsports environments.\u003c\/li\u003e\n\u003cli\u003eCustom heat treatment process ensures every stud meets exact strength specs.\u003c\/li\u003e\n\u003cli\u003ePrecision rolled threads and fit deliver repeatable results in performance engines.\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 Ford engines require this M8 side bolt kit?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Designed for 289 302 and 351W early cast iron Windsor blocks with M8 x 1.25 side bolts usually pre-1970 production verify by measuring your block.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What makes ARP studs stronger than OEM bolts?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e 8740 chromoly construction with post-heat-treat rolled threads achieves 190,000 PSI strength far exceeding factory fasteners.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What torque specs apply and is warranty included?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Follow printed instructions typically 85-110 ft-lbs with ARP lube backed by ARP limited lifetime warranty against defects.\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\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 box 1 x 6 x 7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.1 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":43555500916815,"sku":"ARP156-5201","price":63.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/arp-main-stud-kit-for-ford-side-bolts-early-cast-iron-block-m8-arp.jpg?v=1768370252","url":"https:\/\/www.blackopsautoworks.com\/products\/arp-ford-modular-v8-main-cap-side-bolt-early-cast-iron-block-m8-main-bolt-kit","provider":"Black Ops Auto Works","version":"1.0","type":"link"}