{"product_id":"1946-1948-ford-21a-4751-21a-4750-rear-radius-rods-trailing-arms-pair-used-1","title":"1942-48 Ford 21A-4750\/21A-4751 Rear Radius Rods Trailing Arms Pair Used","description":"\u003cp\u003e🔥 1942–1948 FORD REAR RADIUS RODS — OEM 21A-4750 \/ 21A-4751 | STRAIGHT PAIR | HOT ROD 🔥\u003c\/p\u003e\n\n\u003cp\u003eFord's short rear radius rods — commonly called \"hairpins\" in the hot rod world — are one of the most sought-after suspension components for traditional pre-war and early postwar Ford builds. This is a straight, solid original pair, part numbers 21A-4750 (driver) and 21A-4751 (passenger), pulled from a longtime collector's estate.\u003c\/p\u003e\n\n\u003cp\u003eThese short arms are the correct OEM units for the '42–'48 Ford and a perennial favorite for builders using the stock Ford rear end in a traditional hot rod chassis. Finding a clean, usable pair in this condition is getting harder every year.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e✅ Features \u0026amp; Details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOEM Ford rear radius rods, part numbers 21A-4750 and 21A-4751 — matched pair\u003c\/li\u003e\n\u003cli\u003eShort \"hairpin\" style — the correct and desirable factory configuration\u003c\/li\u003e\n\u003cli\u003eStraight and solid — no bends, no cracks\u003c\/li\u003e\n\u003cli\u003eSome light surface pitting consistent with age and storage — does not affect usability\u003c\/li\u003e\n\u003cli\u003eReady for cleaning, refinishing, and installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003e🚗 Known Fitment \u0026amp; Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1942–1948 Ford passenger cars\u003c\/li\u003e\n\u003cli\u003eWidely used in traditional hot rod rear suspension builds\u003c\/li\u003e\n\u003cli\u003eAdditional applications may exist — buyer should verify fitment for their specific build\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003e📋 Condition Summary\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUsed OEM. Both arms are straight and structurally sound with some light surface pitting consistent with age. No missing hardware noted. Review all photos — they document condition on both arms in detail.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBuyer Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis item comes from the collection of a longtime car collector and builder who is downsizing — a well-curated accumulation built over decades. While you're here, take a look at our other listings for additional vintage parts, tools, and automobilia.\u003c\/p\u003e\n\u003cp\u003ePhotos are part of the description — please review all images carefully before purchasing, as they document condition and detail. Buyers are responsible for confirming fitment and compatibility for their specific application; additional applications beyond those listed may exist. Sold AS-IS, no returns — please ask all questions before purchasing.\u003c\/p\u003e","brand":"FBI-DEN","offers":[{"title":"Default Title","offer_id":45070553645109,"sku":"21A-4750\/21A-4751-1","price":173.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2350\/7867\/files\/20260315_160231.jpg?v=1774043990","url":"https:\/\/flatbrokespeed.com\/products\/1946-1948-ford-21a-4751-21a-4750-rear-radius-rods-trailing-arms-pair-used-1","provider":"Flat Broke Speed","version":"1.0","type":"link"}