Thread: Mid pipe mods
View Single Post
      06-29-2021, 11:59 AM   #177
Pantagathus
Lieutenant
746
Rep
596
Posts

Drives: 2021 M3 BGM
Join Date: Feb 2021
Location: California

iTrader: (0)

Quote:
Originally Posted by McLaren720s View Post
So what's the general consensus for best sound?

Remove both resonators?

Or

Remove secondary cats and primary resonator?
I think general consensus is:
- front resonator by itself barely worth doing
- both resonators + x-pipe (or h) is a modest increase - many people seem reasonably happy with this, and no emissions/smog worries
- secondary cat removal best bang for buck, particularly when paired with dual resonator removal + x-pipe (or h). You can also leave rear resonator to take advantage of the x built into that resonator

None of those options seems to give drone, and when engine is in comfort with valves closed it's still pretty quiet.

I would like to do secondary plus resonator removal. Finding a shop in Cali to do it that isn't a complete hack job is challenging. Thinking of either buying the PSI one and and installing myself (expensive) or doing dual resonators and telling myself to not be greedy
Appreciate 1
OwnerF16881.50