{"product_id":"arp-flexplate-bolt-kit-for-gen-ii-ls-small-block-chevrolet-pro-series-m11-x1-5-aerospace-alloy","title":"ARP Flexplate Bolt Kit for Gen II\/LS Small Block Chevrolet — Pro Series M11 x1.5 Aerospace Alloy","description":"\u003cstrong\u003eARP 244-2901 Pro Series flexplate bolts are high-strength, aerospace‑grade replacement fasteners engineered for Gen II\/LS series small block Chevrolet engines.\u003c\/strong\u003e\n\n\u003cp\u003eThese bolts replace factory hardware with a heavier-duty solution designed to resist fatigue and maintain clamping integrity under high-stress conditions. Forged from aerospace alloy and carefully heat-treated before thread rolling and machining, this ARP kit features a flat 12-point head and an increased shank diameter to improve register and shear resistance compared with stock bolts. The kit uses M11 x 1.5 thread size and accepts 3\/4 inch wrenching for common garage tools.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these bolts improve reliability on high‑torque engines?\u003c\/h3\u003e\n\u003cp\u003eARP bolts are made from a superior alloy and receive a controlled heat treatment that increases tensile strength and fatigue life. The larger-diameter shank reduces the risk of shear failure at the hub while the precise thread rolling produces consistent preload when torqued.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eForged aerospace alloy construction for higher tensile strength\u003c\/li\u003e\n  \u003cli\u003eHeat-treated prior to thread rolling to improve fatigue resistance\u003c\/li\u003e\n  \u003cli\u003eLarger-than-stock shank diameter lowers shear stress at bolt seat\u003c\/li\u003e\n  \u003cli\u003eThread geometry yields consistent, repeatable clamp load\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat sizing and fitment details should I check before ordering?\u003c\/h3\u003e\n\u003cp\u003eThis ARP kit is specified for Gen II\/LS series small block Chevrolet applications and uses an M11 x 1.5 thread size with a 3\/4 inch wrenching head. Verify your flexplate and crank flange accept M11 bolts and confirm the thread pitch matches factory fasteners to ensure proper engagement.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePart number: 244-2901 — ARP Pro Series flexplate bolts\u003c\/li\u003e\n  \u003cli\u003eThread size: M11 x 1.5 — match to engine crank or flexplate threads\u003c\/li\u003e\n  \u003cli\u003eHead style: flat 12-point for stronger tool engagement\u003c\/li\u003e\n  \u003cli\u003eWrenching size: 3\/4 inch — compatible with standard hand tools\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow are these bolts installed and torqued for best results?\u003c\/h3\u003e\n\u003cp\u003eInstall bolts into clean, dry threads and follow the vehicle manufacturer’s torque sequence when seating the flexplate. Use a calibrated torque wrench and, if ARP recommends it, specific lube or thread treatment to achieve correct preload without over-torquing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eClean crank and flexplate threads before installation\u003c\/li\u003e\n  \u003cli\u003eUse the correct torque sequence and specified torque values\u003c\/li\u003e\n  \u003cli\u003eApply ARP-recommended lubricant or assembly compound if specified\u003c\/li\u003e\n  \u003cli\u003eRecheck torque after initial run-in per service guidelines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes the ARP Pro Series head design beneficial?\u003c\/h3\u003e\n\u003cp\u003eThe exclusive flat 12-point head increases the contact area for sockets and reduces rounded-corner failures common with smaller bolt heads. That design simplifies installation in tight spaces and helps maintain tool grip during high-torque tightening.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFlat 12-point profile for improved socket engagement\u003c\/li\u003e\n  \u003cli\u003eLower risk of tool slippage in confined engine bays\u003c\/li\u003e\n  \u003cli\u003eDurable head geometry that resists rounding under load\u003c\/li\u003e\n  \u003cli\u003eSmoother torque application for consistent clamp force\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? ARP 244-2901 is intended for engine builders, performance tuners, and Chevy owners upgrading Gen II\/LS small block drivetrains who want a durable, serviceable upgrade over OEM flexplate bolts. If you routinely push engines with increased torque, race use, or frequent assembly\/disassembly, these bolts offer stronger registration and more consistent preload than stock hardware.\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 a direct fit for LS Gen II small block Chevy?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the ARP 244-2901 is made for Gen II\/LS small block Chevy applications but confirm your crank\/flexplate threads accept M11 x 1.5 before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What wrench size do I need to install these bolts?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: These bolts use a 3\/4 inch wrenching head and a 12-point socket fits for proper installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":48086791061662,"sku":"B003XUH4QM","price":50.18,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/arp-flexplate-bolt-head-closeup.jpg?v=1785905306","url":"https:\/\/northtrailauto.ca\/products\/arp-flexplate-bolt-kit-for-gen-ii-ls-small-block-chevrolet-pro-series-m11-x1-5-aerospace-alloy","provider":"North Trail Auto","version":"1.0","type":"link"}