There is no way a 4'' pipe is restricting flow. Not even with an aftermarket TB that is larger. By having a longer intake AND it being larger than the TB you make up for any ''restrictions.


Has any one ever put there hand oner the TB when it is idling? or when you rev it up? There is not a lot of air flowing at all.


I'm going to do some reaserch because i know some one is going to ask me to prove it