Radiator Insulator: Corvette Later 76-82 Corvette ( 4 set)The Radiators on many cars have different size tanks which are supported by these types of insulators. Corvettes from 82 back to 76 this is the set of 4 needed. Normally this insulator is used on the upper tank area between the fan Shrould and the radiator tank join.. and note that it has ONE locating nib only. For Corvette Applications as pictured.. this is a set of FOUR.