Very unimpressed with magnex as the welds rusted and it didnt actually sound much different from OE In the end i was either gonna go for powerflow or supersprint Went for powerflow as i didnt have the cash for a supersprint, or though i will get on at some point as they sound awesome when its a full system Powerflow is quality materials, lifetime warranty and you can spec exactly what you want, but, as with all custom exhaust companys it will only be as good as the bloke making it. I live 5 mins from their UK HQ so they are spot on from there, but have heard of 1 or 2 places being let down by