Originally Posted by BMW-x5-48is

pnoyako85 - just x-pipe?? or any other work you had done?? ... I spoke to John Thorne
from - thorneymotorsport.co.uk - they have their own exhaust now for the 4.8is and not the SS, its a custom made system to give a better noise and power.. race cats and smaller silencers, adds power and torque and of course a lovely noise. They want $4200 for it... so Im considering either buying theirs or having a local shop redo my entire exhaust system.. I have H pipe & love it - but feel like I can get a even better sound/power out of this beast