14's
I am willing to bet if you go to a track, you will pull a 14.80 or maybe a little better. As like everyone else says, the Flowmaster mufflers can be sold on e-bay. Everyone is telling me to go with ATR, which is expensive, but worth it. If you got the test pipe already, then you should just get a pair of cherry bombs and put the pipes out the rear. The mufflers are just for the dampening so no car alarms or neighbors go off on ya.
In NJ, I know I cannot get away with no cat, they check under the car in this state, so a garage and 50 bux gets me through inspection. As for your recipe, try to get the best gas you can, and you may be able to get an exta ounce of boost to get those et's lowered, and let us know how you do.
John