I got my plog and stainless 3" catless dp put on yesterday. Car isnt much louder at all (thank god). The only problem is I can't tell if it made much of a power difference. I tried accellerating from a dig. just wheelspin, then of course my abs light was on so i can't turn off the traction control.Tried accelerating from a 20mph roll. same thing. wheelspin and traction control. I then took the car to 50mph, dropped it in to 2nd and floored it. again wheelspin! haha, kidding. took the car from 50-80 or so. It feels like it has a little more top end where as before, it was just all low end torque. After my car sits all night, the abs light is off when i first get in the car. Once the car warms up, it comes on. S****y thing is it's f'n snowing now, so no chance today to get a good idea. Anyways, the parts are on the car, and I'm happy its not much louder. I took the res off my regal and it was loud as hell. Too bad V6's sound like crap. Just thought I'd share this mostly useless information.