intake manifolds

Well I was going to grab an air gap and was told by Don not to waste my money as for a street driven car it wouldn't be the best idea. He claims to many guys run them expecting the worlkd and hurt their performance from too cold/dense air fuel mixtures etc.

I've already put the rpm performer on just haven't driven the car yet. I still have my number smatchign 340 sleeping in the shed all wrapped up so have toi decide if I'm getting rid of the intake or leaving it for the 340 for the rainin g day I go factory.