Quote:
Originally Posted by Sbm007
Not Armytrix or Akra, but a exhaust shop in the UK fabricated one for me using HJS cats.
My only mod: catted downpipes
https://g80.bimmerpost.com/forums/sh....php?t=1883418
Video clip at the bottom
Yours will sound better because US doesn't have OPF/GPF filter - in any case I could notice a slightly deeper exhaust note and longer and more aggressive burbles |
Have you noticed any increase in power, throttle response, turbo response?