Quote Originally Posted by tlane3546 View Post
yes but why would you need a 4 inch pipe when the throttle body its going into is only 3 inches. and the MAF is only 3 inches. Doesnt make any sense
also my MAF is directly on my TB......so for me, the four inches allows for as much possible flow through the bends, angles and the air capacity that the IAT gauge sits........so you are getting a full three inches worth(or whatever max capacity is) into the TB......otherwise these things would not allow a true three inch pipes worth of flow into the TB.