Well a couple weeks ago i started hearing the hiss of an exhaust leak but only as its on the road and under stress.I took it to a local exhaust shop after trying to track it down myself with no results and they told me that it wasnt the exhaust.How they came to that after 1 minute on the rack ill never know.But anyway it's coming from the passenger side,it almost seems to be my manifold gasket but im not sure...anyone else had an exhaust leak on a 3.4 from that area?