{"product_id":"arp-pro-series-torque-converter-bolt-kit-for-gm-4l60-4l80-6-piece-chromoly-12-point-head-black-oxide","title":"ARP Pro Series torque converter bolt kit for GM 4L60\/4L80 — 6-piece chromoly, 12-point head, black oxide","description":"\u003cp\u003e\u003cstrong\u003eARP 2307305 is a six-piece Pro Series torque converter bolt kit engineered for 4L60 and 4L80 transmissions, offering chromoly strength, a 12-point head and black oxide finish for durable clamping reliability.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis bolt kit supplies the exact hardware you need to secure a torque converter to the flexplate on GM 4L60\/4L80 applications. Each bolt measures 10 mm x 1.50 thread with a length of 0.590 inches and features a high-strength chromoly construction with a black oxide coating for corrosion resistance and consistent torque signatures. The 12-point head improves socket engagement, while the kit’s vehicle-specific fitment reduces guesswork during installation.\u003c\/p\u003e\n\n\u003ch3\u003eWhat makes these bolts stronger than the OEM fasteners?\u003c\/h3\u003e\n\u003cp\u003eARP uses a chromoly alloy and controlled manufacturing to increase shear and tensile strength over typical stamped or mild-steel factory bolts. That higher material strength helps resist stretching and failure under repeated clutch engagement and high-torque conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eChromoly construction for improved tensile and shear capacity\u003c\/li\u003e\n  \u003cli\u003ePrecision threads for consistent clamping force\u003c\/li\u003e\n  \u003cli\u003e12-point head for better socket contact and reduced rounding\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish for basic corrosion resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I know these fit my transmission?\u003c\/h3\u003e\n\u003cp\u003eThis ARP kit is listed as part number 230-7305 and is specified for GM 4L60 and 4L80 transmission models. The kit’s 10 mm x 1.50 thread and 0.590 in length match the common factory thread engagement for those converters, making it a direct replacement in compatible setups.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePart number: 2307305 (ARP Pro Series)\u003c\/li\u003e\n  \u003cli\u003eFits: 4L60 and 4L80 applications (vehicle-specific compatibility)\u003c\/li\u003e\n  \u003cli\u003eThread: 10 mm x 1.50; Length: 0.590 in\u003c\/li\u003e\n  \u003cli\u003eQuantity: set of 6 bolts, suitable for most converter patterns\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat installation benefits does the 12-point head provide?\u003c\/h3\u003e\n\u003cp\u003eThe 12-point head increases contact surface with the socket, allowing tighter access in cramped areas and reducing the likelihood of rounding compared with worn 6-point fasteners. This design is useful when aligning the converter and reaching bolts near the transmission bellhousing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEasier access in tight bellhousing spaces\u003c\/li\u003e\n  \u003cli\u003eBetter torque application and reduced slippage\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard 12-point sockets for workshop tooling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre there corrosion or longevity considerations?\u003c\/h3\u003e\n\u003cp\u003eARP applies a black oxide layer that provides modest corrosion resistance and a smoother finish for assembly; however, black oxide is not a heavy-duty plating like zinc or cadmium. For prolonged exposure to harsh environments, consider additional anti-seize or protective coatings during installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBlack oxide finish reduces surface rust and improves appearance\u003c\/li\u003e\n  \u003cli\u003eChromoly core maintains mechanical strength over time\u003c\/li\u003e\n  \u003cli\u003eUse thread lubricant or anti-seize per ARP guidance for best results\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Technicians, engine builders and DIY enthusiasts replacing or upgrading torque converter fasteners on GM 4L60\/4L80 transmissions will value the ARP 2307305 kit. Choose this set when you want a direct-fit, higher-strength alternative to OEM hardware for drivetrain reliability during rebuilds, high-torque builds or routine maintenance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003ePackage weight: 0.5 pounds\u003c\/li\u003e\n  \u003cli\u003eFit type: Vehicle Specific\u003c\/li\u003e\n  \u003cli\u003eIncludes six 10 mm x 1.50, 0.590 in long, 12-point chromoly bolts\u003c\/li\u003e\n\u003c\/ul\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: How many bolts are included in the ARP 2307305 kit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The kit contains six chromoly torque converter bolts sized 10 mm x 1.50 with 0.590 in length.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will these bolts fit my 4L60\/4L80 transmission?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—ARP 2307305 is specified for GM 4L60 and 4L80 applications, but verify your converter pattern before installing.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":48086089007262,"sku":"B000O3RSK8","price":48.2,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/arp-2307305-front-view-packaging.jpg?v=1785884122","url":"https:\/\/northtrailauto.ca\/products\/arp-pro-series-torque-converter-bolt-kit-for-gm-4l60-4l80-6-piece-chromoly-12-point-head-black-oxide","provider":"North Trail Auto","version":"1.0","type":"link"}