i need to buy some new headers but do not know what kind i have on there now. my question is, are all long style headers the same length and do they all go down the same distance? the reason for this is, i have good exhaust and i don't want to change that out to make up for different lenghts. also, does ceramicoat make a big difference and how does it hold up to baked on mud?? any help would be great.