i was running a straight pipe behind the converter, it was loud as sheeeeet! i have the 5.2Li didnt notice a difference in performance but it was just too loud to be a daily driver and do alot of stop and go driving. i put magnaflow exhaust on
If you don't like the harrasing by cops for the "loud as sheeeeet" part, I would recommend going with Flowmaster 2 chamber exhaust. A friend of mine has it on his 305 and it sounds awesome. Personally, I went with 3 chambers with 3" pipes and 3.5" tips, a nice low rumble that sounds mean but not to loud.
Beleive it or not the cat is not as restrictive as some may think (unless its clogged)in general its the muffler that provides the needed back pressure, and that is where the low end torque comes from.In your case, depending on the size of strait pipe you use (dia/length)it will effect how the power comes on.Less back pressure will allow the motor to rev,more back pressure makes torque.Take your choice.
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