powercore Q

[R-Crazy]

what is the power increase with a powercoreQ? are they any good? how loud are they?
Thanks

dave

[2000SPORT]

I just got the regular powercore 4 for my 300. It surprised me with its gains. It wasn't as loud as I expected either. I figured I'd order the quiet core insert if it was too loud. I don't think I need too. It seems to only be loud if I lay into it and rev it out. If I go easy and short shift it isn't much louder than stock. I did notice the gains though, especially when I could finally beat my cousin on his blaster. I got the headpipe with it too. It's larger than stock, which probably helped a lot.