The cats I'm going to use are called Venom they have a metal core and have a heat shield they look very well built, 32krazy those look great but I'm down in Australia might take to long to get them.

Mike removing the resenator will definatly help the exhaust note but I dont think It'l improve hp (as it's straight through) apart from the weight reduction.

Changing up the cats will help the exhaust note and get some hp gains.

I'm doing a dual cai so I'm focusing on helping the car get as much air as it can in and efficently relasing that air without compromising to much of a loss of back pressure (otherwise I'll loose power & torque)