Thanks to all the great info from the members of this board i've gotten my engine running better than I ever could have on my own. I'm getting ready to take it down to the local muffler shop and get the best flowing exaust I possibly can, But I have heard some people say that some back pressure on a system is good. I am wondering what I can expect (besides noise reduction) from installing a true dual and say a pair of flowmasters as compared to the way the engine would run with just the open headers. Will there be any part of the torque curve that will benifit by having slightly more back pressure on the engine? If so where?

the vehicle is a 94 s10, the engine is a mild 355 with edlebrock performer intake, l82 cam, holley 650 double pumper and 195/160 heads. the tranny is a new turbo 350 running through (as of right now) the original 273 rear end.

any thoughts would be greatly appreciated