NOS RC15 BIG Ear Radiator Cap GM AC 861050. Picture doesn't do it justice. Check out my other caps. The item "Original NOS BIG Ear RC15 Radiator Cap Shines AC Show Car Mint in box" is in sale since Thursday, January 16, 2020.This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Cooling System". The seller is "widetires22" and is located in Oneonta, New York. This item can be shipped worldwide.