I'm suspecting my cats are stopping up and I wanna cut them. I'm assumiong this will cause gas mileage to decrease and the valves to rattle some..power is also down from what it used to be.

Here's my question. If I do, how much low-end can I expect to loose? I'm not really fond of loosing any low end torque if I can help it. Any pros/cons I don't know about? I don't have emission testing here..so thats not a problem. I know I'll have to get the rear 02 sensor's disabled.