They always seem to be the first thing that gets tossed aside on a EFV8, how much difference they make as far as cooling I haven't a clue and other here will know more than me.....I will say from a"judging" standpoint and "authenticity" stand point, if that is what you are trying to achieve....they are one of IF not the first thing I look for when "smoking" a car over!!!!!! IF they've taken care of such an obvious detail then you can bet the rest of the car is pretty well presented as it should be!!!! AND Once again a shout out to KiwinUS (Tony) as he helped tremendously in fulfilling a 25 plus year quest for some 35 right hand drive engine tins a few years back!!!! Thank you ever so much for all of your help and efforts!!!!