the ceramic coating helps keep the engine bay temps down, by keeping more exhaust heat in the exhaust system....
there is a benifit from this, however, with daily drivers, this seems to be a debate...
If I was racing the car, and wanted very benifit I could possibly get... they yeah, the 250 is well worth it... if anything just to keep engine bay temps down
from a daily driver point of view... some say yes, some say no... I say do what your budget can afford... if the extra 250 is no big deal... go for it... however if you only have $XXX amount to spend on aftermarket, then going for no ceramic could get you the headers and a CAI for the same price as just ceramic headers.... when I was going to put headers on my truck... the benifit vs cost for ceramic just wasnt there... ceramic worked out the be double the price...(shorties)