why does the air intake on the 3.9 constrict
Starting from the air filter box intake (1995 RRC in this case); it expands through the intake trumpet, then expands about 1/2" when it exits the air filter box into the hose that connects to the MAF. On the other end of the MAF it shrinks a small amount and then when it hits the plenum intake (right before the throttle plate) it shrinks again by about 1/4".
It would seem to be very restrictive - especially the intake horn - at higher RPMs, but maybe I'm missing something.
Keeps water out of the filter housing?
Does anyone know why?
2011 RR HSE -
1970 LR Series 2A Bugeye BenzOver
2001 GMC 2500 4wd