i most probebly havent heard it coz i dont personally know any1 that has a CAI anyway!? LOL yea id probebly notice it if i was listening out 4 it... but yea i mostly just drive from A to B.. never gone out cruising with other modded up carz b4, just 4wdz... ill try 2 pay attention next time i go 2 a meet ill come out to get some bread off you on sat !! .. ill try park near your shop .. and you can have a look n listen !