{"product_id":"arp-stainless-rear-end-cover-bolt-kit-for-gm-12-bolt-170-000-psi-precision-threads","title":"ARP Stainless Rear End Cover Bolt Kit for GM 12‑Bolt — 170,000 PSI, Precision Threads","description":"\u003cp\u003e\u003cstrong\u003eARP 4373002 is a stainless-steel bolt kit designed to replace and upgrade the rear end cover fasteners on GM 12-bolt differentials, delivering superior strength and corrosion resistance while including matching washers.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese bolts are manufactured by ARP under controlled in-house processes to meet high quality standards. Machined threads and a 170,000 psi tensile rating give the hardware much greater load capacity than typical OEM or Grade 8 bolts, and the stainless finish resists rust while adding a polished look to painted or chrome differential covers.\u003c\/p\u003e\n\n\u003ch3\u003eHow will these bolts improve my GM 12-bolt rear end?\u003c\/h3\u003e\n\n\u003cp\u003eSwapping stock fasteners for the ARP stainless set increases clamping reliability and reduces the chance of thread failure under stress. The precise machining ensures even engagement, which helps maintain proper cover sealing and alignment over time.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e170,000 psi tensile strength for enhanced durability\u003c\/li\u003e\n  \u003cli\u003ePrecision-cut threads for secure fit and consistent torque\u003c\/li\u003e\n  \u003cli\u003eStainless material prevents rust and staining in exposed areas\u003c\/li\u003e\n  \u003cli\u003eIncludes washers for correct load distribution and installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill the stainless finish affect the look of my differential?\u003c\/h3\u003e\n\n\u003cp\u003eThe bright stainless surface creates a clean contrast against painted OEM covers and complements chrome aftermarket covers for a more finished appearance. Because the material resists discoloration, the visual upgrade is long-lasting with minimal maintenance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eLustrous stainless contrasts with dark or painted covers\u003c\/li\u003e\n  \u003cli\u003eWorks well with chrome-plated aftermarket covers\u003c\/li\u003e\n  \u003cli\u003eLow upkeep—resists rust and staining\u003c\/li\u003e\n  \u003cli\u003eUniform appearance thanks to quality machining\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these bolts strong enough for heavy-duty or performance use?\u003c\/h3\u003e\n\n\u003cp\u003eYes — with a 170,000 psi rating these fasteners exceed the strength of standard hardware and even surpass Grade 8 in tensile capacity. That higher strength reduces the risk of stretch or breakage under high torque or load conditions commonly encountered in performance and towing applications.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eTensile rating significantly higher than Grade 8 equivalents\u003c\/li\u003e\n  \u003cli\u003eDesigned to withstand higher clamping and shear loads\u003c\/li\u003e\n  \u003cli\u003ePrecision threads lower the chance of stripping during service\u003c\/li\u003e\n  \u003cli\u003eWashers included to maintain even clamping pressure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I know about fitment and installation?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit is intended specifically for GM 12-bolt rear end covers and includes the correct quantity and type of bolts and washers for a proper replacement. Standard hand tools are sufficient for installation, but following OEM torque specifications and using proper thread engagement practice is recommended.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMade for GM 12-bolt differential covers—confirm vehicle application before purchase\u003c\/li\u003e\n  \u003cli\u003eComes complete with matching washers for correct load distribution\u003c\/li\u003e\n  \u003cli\u003eInstall with recommended torque values and even cross-pattern tightening\u003c\/li\u003e\n  \u003cli\u003eUse clean threads and check for proper engagement to avoid leaks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The ARP 4373002 kit is aimed at enthusiasts, restoration builders, and technicians who want a durable, corrosion-resistant fastener upgrade for GM 12-bolt rear ends. It suits anyone replacing worn or corroded hardware, upgrading to a higher-strength solution for performance or towing, or adding a polished visual detail to a visible differential cover.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these bolts compatible with all GM 12-bolt differentials?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They are made for GM 12-bolt rear end covers; verify your specific model year and cover bolt pattern before buying.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do the bolts include washers and are they corrosion resistant?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the kit includes washers, and the stainless-steel construction resists rust and discoloration.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":48086138978462,"sku":"B000CFQ9OY","price":46.84,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/arp-stainless-rear-end-cover-bolts-front-packaging.jpg?v=1785886299","url":"https:\/\/northtrailauto.ca\/products\/arp-stainless-rear-end-cover-bolt-kit-for-gm-12-bolt-170-000-psi-precision-threads","provider":"North Trail Auto","version":"1.0","type":"link"}