I have a bad crossover pipe leak. I am trying to find out how it effects the performance other than the exhaust noise. Does it cause the car to hesitate? I have had a minor hesitation problem at initial running. when the car warms up, it minumizes but does not completely go away. (i think it is leaking because it was not placed back correctly when the transmission was repaired).
It will cause hesitation, possibly rough idle, and many other things.