Hmm, My lighter element is different. shorter, 1 1/2 inches. I don't have the 4th piece. and my housing is different. mine is 1 7/8 long and doesn't have any slots or holes on the sides. I got the lighter and housing from NPD. they said that's all I need. after receiving the pieces, something didn't look right, NPD doesn't carry the element. I got that ftom Classic Ind. all 3 parts are suppose to be for a 68 firebird.