Dom - really 488 @ the wheels? Flip me that's like 540 @ fly!!
As said I'm going decat ... Yes it's going to be louder .... I'll see how it goes and if I get fed up with the noise I'll swop my exhaust out for a quiter system ( miltek) I have a invidia at the moment with berks HFC , it's as loud as I would want to go really but enjoy the extra noise over the summer and maybe change over the winter . .....