I don't have the first two cats, and I would like to get high flow cats for the rear. gimme some info guys.

Check out CarSounds cats. A couple of years ago I was looking at high flow cats and these flowed very well. Not as sexy as saying you have Brabus cats but nowhere near the cost and will flow as well or better than the high dollar cats.

Since your car is all ready illegal why not just remove all the cats?

Not in Florida

I would look at Magnaflow hi-flow cats.

I have personally seen them passing NJ exhaust regulations.

http://www.warpspeedperformance.com/metalsubstrate.htm

That's my recomendation