{"product_id":"btr-crank-gear-aftermarket-gen-iii-iv-ls-crankshaft-in-oem-gen-v-block-chamfered-end-and-i-d-grind-btr31217","title":"BTR CRANK GEAR - AFTERMARKET GEN III\/IV LS CRANKSHAFT IN OEM GEN V BLOCK - CHAMFERED END AND I.D. GRIND - BTR31217","description":"\u003ch3\u003eBTR CRANK GEAR - AFTERMARKET GEN III\/IV LS CRANKSHAFT IN OEM GEN V BLOCK - CHAMFERED END AND I.D. GRIND - BTR31217\u003c\/h3\u003e \u003cp\u003eThe BTR31217 Crank Gear is the ultimate problem-solver for custom cross-generation engine builds.Engineered by Brian Tooley Racing, this specialty crank gear allows you to seamlessly install a high-performance aftermarket Gen III\/IV LS crankshaft into an OEM Gen V engine block\u003c\/p\u003e \u003cp\u003e\u003cem\u003e\u003cstrong\u003eWhy You Need It\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003eInterchanging OEM and aftermarket components between Gen III\/IV and Gen V setups introduces two significant geometric roadblocks at the crankshaft snout:\u003c\/p\u003e \u003cp\u003e\u003cbr\u003e\u003cstrong\u003eThe Fillet Radius Conflict: \u003c\/strong\u003eFactory cranks use a rolled fillet, allowing standard gears to sit flat. High-performance aftermarket cranks typically feature a larger, 3mm (.125”) conventional fillet radius for added strength. Standard crank sprockets will bind on this radius, placing them under extreme pressure until they eventually split under high RPM.\u003c\/p\u003e \u003cp\u003e\u003cbr\u003e\u003cstrong\u003eThe Snout Inner Diameter (I.D.) Variation: \u003c\/strong\u003eAftermarket Gen III\/IV LS crankshafts feature a different snout profile compared to Gen V platforms.\u003cbr\u003eThe BTR31217 eliminates both issues simultaneously. It features a precision-machined inner diameter (I.D.) grind alongside a specialized chamfered end to perfectly clear the heavy-duty fillet radius. This guarantees a flush, worry-free seat against the mating face of the snout.\u003c\/p\u003e","brand":"Brian Tooley Racing","offers":[{"title":"Default Title","offer_id":47878535348380,"sku":"BTR31217","price":53.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0473\/3206\/5436\/files\/btr31217_1_of_3.jpg?v=1791772702","url":"https:\/\/daroracing.com\/products\/btr-crank-gear-aftermarket-gen-iii-iv-ls-crankshaft-in-oem-gen-v-block-chamfered-end-and-i-d-grind-btr31217","provider":"Daro Racing","version":"1.0","type":"link"}