{"product_id":"arp-89-6-97-dodge-cummins-5-9l-diesel-12v-2-bolt-main-stud-kit","title":"ARP 89-6\/97 Dodge Cummins 5.9L Diesel 12V 2 Bolt Main Stud Kit","description":"\u003ch4\u003eChromoly Main Studs Built For High-Boost 5.9L Cummins Builds\u003c\/h4\u003e\n\u003cp\u003eThe ARP 247-5402 replaces the factory main cap bolts on the 5.9L 12V Cummins with 14mm chromoly main studs, giving the block additional clamping strength to resist cap walk under high-boost and high-horsepower conditions. Each stud in the 247-5402 kit is machined from 8740 chrome moly steel and heat-treated to a tensile strength of 190,000 to 200,000 psi, then centerless-ground and thread-rolled to MIL-S-8879 specification for consistent, repeatable clamp load. The black oxide finish on the 247-5402 studs resists corrosion during the life of the engine build. This is a main stud kit only and is not designed for cylinder head applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e247-5402 uses 14mm chromoly main studs for the 5.9L 12V Cummins block\u003c\/li\u003e\n\u003cli\u003eManufactured from 8740 chrome moly steel, heat-treated to 190,000-200,000 psi tensile strength\u003c\/li\u003e\n\u003cli\u003eCenterless-ground and thread-rolled to MIL-S-8879 specification\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eIncludes hardened parallel-ground washers and high-strength hex nuts\u003c\/li\u003e\n\u003cli\u003eMain studs only, not intended for cylinder head bolt applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eTrim\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1989-1997\u003c\/td\u003e\n\u003ctd\u003eDodge\u003c\/td\u003e\n\u003ctd\u003eRam\u003c\/td\u003e\n\u003ctd\u003eCummins 5.9L 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPN\u003c\/td\u003e\n\u003ctd\u003e247-5402\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e672036034603\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStud Diameter\u003c\/td\u003e\n\u003ctd\u003e14mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e8740 chrome moly steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTensile Strength\u003c\/td\u003e\n\u003ctd\u003e190,000-200,000 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Spec\u003c\/td\u003e\n\u003ctd\u003eMIL-S-8879, centerless-ground and thread-rolled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eBlack oxide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eMain studs (not cylinder head)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSet of 14mm chromoly main studs (247-5402)\u003c\/li\u003e\n\u003cli\u003eHardened parallel-ground washers\u003c\/li\u003e\n\u003cli\u003eHigh-strength hex nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAbout ARP\u003c\/h4\u003e\n\u003cp\u003eARP manufactures premium fasteners for engine building, including the 247-5402 main stud kit, using chrome moly steel and precision thread-rolling to deliver consistent clamp load under repeated high-stress cycles. ARP's manufacturing process is built around tighter tolerances and higher tensile strength than factory OE hardware.\u003c\/p\u003e\n\u003ch4\u003eRelated Parts\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAlphaRex 2024+ Toyota Land Cruiser NOVA Series LED Third Brake Light Alpha - Black\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFAQ\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the ARP 247-5402?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe ARP 247-5402 is a 14mm chromoly main stud kit for the 1989-1997 Dodge Ram 5.9L 12V Cummins, replacing the factory main cap bolts to resist cap walk under high-boost conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 247-5402 fit cylinder head applications?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, the 247-5402 is a main stud kit only and is not designed or rated for cylinder head bolt applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the tensile strength of the 247-5402 studs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 247-5402 studs are heat-treated to a tensile strength of 190,000 to 200,000 psi.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat hardware is included with the 247-5402?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 247-5402 kit includes the main studs, hardened parallel-ground washers, and high-strength hex nuts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat finish does the 247-5402 use?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 247-5402 studs use a black oxide finish for corrosion resistance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy upgrade to main studs instead of factory main bolts?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMain studs like the 247-5402 provide more even and higher clamp load than factory bolts because studs thread into the block and are torqued with a nut, reducing the risk of cap walk in high-horsepower or high-boost applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat years of Cummins does the 247-5402 fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 247-5402 is designed for the 1989 through 1997 5.9L 12V Cummins engine used in Dodge Ram trucks of that era.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 247-5402 require machine work to install?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMain stud kits like the 247-5402 typically require the block to be align-honed or checked for proper stud hole preparation consult ARP's installation instructions and an experienced engine builder before installation.\u003c\/p\u003e\n\u003ch4\u003eInstall Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eRemove the engine and disassemble down to the bare block, following the factory service procedure for the 5.9L 12V Cummins.\u003c\/li\u003e\n\u003cli\u003eClean and inspect the main cap and block threads, and have the block align-honed if required for stud installation.\u003c\/li\u003e\n\u003cli\u003eInstall the 247-5402 studs into the block per ARP's included torque specifications.\u003c\/li\u003e\n\u003cli\u003eSet the main caps in place and install the hardened parallel-ground washers and hex nuts.\u003c\/li\u003e\n\u003cli\u003eTorque the 247-5402 nuts in the proper sequence and stages per ARP's instructions.\u003c\/li\u003e\n\u003cli\u003eComplete engine reassembly and verify crankshaft rotation is free before returning the engine to service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch4\u003eProp 65 Warning\u003c\/h4\u003e\n\u003cp\u003eThis product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.\u003c\/p\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":46356303315023,"sku":"ARP247-5402","price":309.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/ARP247-5402_1.jpg?v=1786052456","url":"https:\/\/www.blackopsautoworks.com\/products\/arp-89-6-97-dodge-cummins-5-9l-diesel-12v-2-bolt-main-stud-kit","provider":"Black Ops Auto Works","version":"1.0","type":"link"}