Exhausts -

[Dum-Dum]

First off apparently the Hoffman uses crush bends that aren't great for gas flow so is something to consider if your gonna do alot of tuning. Second I think your pricing is a bit wrong, im sure I'd seen the race tube and de-cat at £50 each. Oh and garage fitting will probably be an hour's labour. Someone here might do it cheaper though, if you were local I would for a couple of quid or ill supervise you doing it if you bring me biscuits.