I have this annoying exhaust leak when the car gets warmed up to temp. any ideas of where I should look? I changed the collector gaskets and that helped some and they dont leak any more... but I still hear a leak from somewhere and the header to manifold gaskets looks ok from what I can see and the rest of the pipes look ok....where could it be coming from
the thing that throughs me off is if you first start the car and drive it cold you wont hear it but after its all warm it starts...and Im possitive its not valves,lifters etc. any info would help

I have hooker headers (not sure what type of hooker headers )but then it hooks into a Y pipe with 3"collectors and 3"all the way out the back,incase you wanted to know....