Airbox CLS55 Re-Tune?
and as I understand, you are not buying it from Renn.. or you could better ask them

IMHO, so called CAI kit I have seen seem more "hot" than "Cold" !
I think it all depends on the type of filter it comes with and the amount of air it will let flow.
just to let you have an idea, difference in tuning requirement should be comparable to the intallation of k+n filters in a stock car
if you like that thing so much, then just try



