HFCs, resonators or ...?

[IWantAnE92]

Car: 2008 E90 M3 ~48k miles 6MT
Mods: Active Autowerke Signature exhaust including x-pipe, bpm stage 2 (catless) tune with cold-start delete

So I bought the car with the above mods about a year ago. As much as I LOVE the exhaust's sound above 3k rpm, it's really too loud/droney (I think the drone can be a bit subjective) under 3k rpm, especially when I'm driving out of my neighbourhood at 15-25mph (and doubly so when I have to go to the airport almost every Monday at about 6am!)

What are people's thoughts on:
1. Keeping the x-pipe but adding some:
a) resonators
b) High Flow Cats
2. Switching out the AA x-pipe and putting the OEM x-pipe back with test pipes

If option 1, suggestions for particular brands/part numbers would be much appreciated.

I have in my garage an oem x-pipe which has already been cut, the OEM Cats, and some MS test pipes. I can't decide whether to use those or do something else with the AA x-pipe.

Thanks in advance!

[L4ces]

Originally Posted by IWantAnE92

Car: 2008 E90 M3 ~48k miles 6MT
Mods: Active Autowerke Signature exhaust including x-pipe, bpm stage 2 (catless) tune with cold-start delete

So I bought the car with the above mods about a year ago. As much as I LOVE the exhaust's sound above 3k rpm, it's really too loud/droney (I think the drone can be a bit subjective) under 3k rpm, especially when I'm driving out of my neighbourhood at 15-25mph (and doubly so when I have to go to the airport almost every Monday at about 6am!)

What are people's thoughts on:
1. Keeping the x-pipe but adding some:
a) resonators
b) High Flow Cats
2. Switching out the AA x-pipe and putting the OEM x-pipe back with test pipes

If option 1, suggestions for particular brands/part numbers would be much appreciated.

I have in my garage an oem x-pipe which has already been cut, the OEM Cats, and some MS test pipes. I can't decide whether to use those or do something else with the AA x-pipe.

Thanks in advance!

I have AA muffler and stock pipes and rode in a full AA system and the low rpm drone was similar.

[6ixSpd]

I had the AA signature mufflers paired to the AA HFC XPipe. It was biblically loud and the drone would rattle my soul.

Your best best with those mufflers is OEM XPipe with test pipes, even then I would bet there will be some drone but much deducted compared to now.


I swapped my AA mufflers to an OEM 2-pipe modded muffler setup (still with the HFC XPipe). It definitely reduced drone significantly but the volume was still too much for me.

Ultimately I ended up going back to OEM XPipe with test pipes, paired with M Performance muffler setup. I absolutely love it and there's no drone.

[Route 16]

do you still have the mastermind? I'm getting the iPE F1 muffler set up this Friday, I just can't make my mind up on x-pipe until ipe is on my car