OK, I'm sure I want to go for a Scoobysport downpipe, I want to keep my WR Sport backbox as the noise level is about right for me, but what to do about the centre?

How much of a increase in noise (particularly concerned about booming at motorway speeds) will a SS downpipe and centre cause?

Other option would be a Magnex centre with resonator I guess, but as I'd be going to Scoobysport anyway.....

Bear in mind it's a MY00 wagon which I've heard are a bit noisier than the saloons.

Cheers
Tim