they dont have to have the metal in them,, its there for a PROPER techy reason !!!

i couldnt belive it when i found out

and there all made like that after for a POINTLESS reason of them all looking the same otherwise mechanics would send them back for being the WRONG part

ill tell you why soon though,,,, its soo easy though its pointless but interesting though

but then i also thought the new headgaskets being made from 1 layer of thing steel interesting too son i may not interest you

it shows just how untechy some parts for cars REALLY are though,,, engines are more advanced these days we all know and run hotter we all know but the technology that solving these problems is actually rather basic,,,, so basic that its being over looked too