DAMN I nearly choked when I spent little over 700 for my cat and single exhaust. There are easier ways and less expensive ways to get the performance and sound from an exhaust.

And my Bonez cat and N1 gave me 37rwhp :D

racingbeat makes a presilencer for the gsl-se[wichever one has the 13b]with the airpipe for 5th&6th port set up.its a few $'s more,i would assume that they designed it to functionproperly.i dunno,check it out.give'em call.this is the same thing that i plan to do,but i am still trying to find someone with this setup so i can listen to it,i am concerned about noise levels.i plan to remove my 5th&6th ports.

poor man exhaust
 

I gutted my 1 and 2 cats no #3cat then went 2in pipe to a y pipe made of 2 in with stock muffs 5 and 6 ports open at 4000 rpms did not have the money to spend on a good system I spent 25.00 on pipe and 15.00 on welding rods .:)

Me and my friend went and gutted all 3 of my cats with a long ass screwdriver and a hammer so i have basically a straight pipe that looks legal, was free of cost, and gave me an amazing increase in rwhp while still opening the 5th & 6th ports. Then right after I had the perfect chance to test it out when i was chased on a 2 lane freeway for about 30 miles at about 130-140MPh by some seriously, seriously pist off faggets in a 97 stock Integra and a tricked out civic because I revved my engine while in front of them. Too Fuckin bad cops arent around when you need them!! Anywayz, all i need now are mufflers for a nice tone and to relieve the back pressure the stock ones create (which is very little) and then I will be set; cheaper than any suggestion for an upgrade exhaust system that anyone has yet mentioned on here.

Shoulda gotten out and beat their ass. If their was too many you let them get out then jump back in your car and run them over. Well thats what I would do :D