Hay here! New to Bimmerforums.
Had E31 for yeeeears, back boxes sound good but unfortunately noise (sound) police disagree... Too many rusty holes! Hence seeing what you guys have been saying about replacements.
Same old story, it needs to sound like an 8, not intrusive yet aggressive, no boom, not loud but good low 8 burble.
The conclusions so far....
Keep the resonator, cats are fine, so which back boxes?
I've spent hours trying to find all the video clips with decent audio such as mashpedia, but still unconvinced which is the sound system for me, Not many in Shropshire to compare!
Got quotes for Torquflow, Supersprint, Infinity, Longlife, Eisenmann, Magnaflow, Simon Harkness, still need to hear them all. Need an 8 fest!
Still looking and learning.
All usefull info so far, thanks.