Im thinking of going with the HKS Hi-Power exhaust, but it seems quite loud (at least looking at dB levels compared to stock and other catbacks) and was wondering exactly how much louder it will get with a catless DP. Any help here?

And for those with teh Hi-Power and catless dp...is it too loud for everyday use? I dont want to be waking up the neighbors, or attracting attention to my car.