Exhaust recomendation

[m4h2o]

Hey everyone its been a minute since ive been on here..

Purchased my 16 M4 back in September. Car came with some mods and exhaust was one of them.
Setup;
Evolution racewerks catless downpipes, fabspeed valvetronic full exhaust.

Im looking to get rid of the godawful drone, stench and loudness. What can i do to at least minimize all of this?
Im planning on running e85 from time to time with jordans custom tune if this makes a difference.
Thanks in advance.

[TopJimmy]

Put stock cats back on. They are not that restrictive, Cary can work with them.

You also get to flash to stock annually to pass PA inspection. BM3 won't pass you, need the stock tune. I tried...

[m4h2o]

Originally Posted by TopJimmy

Put stock cats back on. They are not that restrictive, Cary can work with them.

You also get to flash to stock annually to pass PA inspection. BM3 won't pass you, need the stock tune. I tried...

Thanks will look into stock.. fortunately i "know a guy" inspection wont b a problem

[1000hp]

I have stock downpipes, AA equal length mid, and Dinan muffler. Zero drone after shutting off cold start with BM3. Not loud with the resonated mid. Can be louder with non-resonated mid. No rasp. No smell.

[TopJimmy]

When I ran my ER sport cats I still got some stink FWIW. If you're up in NE Philly the Boulevard Wawa has good E, so you could fix the stink that way. I like the moonshine smell coming out of my tailpipe.

[TheMaster1971NL]

Originally Posted by TopJimmy

I like the moonshine smell coming out of my tailpipe.

[mike@x-ph.com]

If you wish on keeping the catless downpipes, either put the stock midpipe back or get the Active Autowerke Equal length resonated midpipes

[six75LT]

one thing to consider is delivery time. if you want to wait a year to get your exhaust then get the AA EL, otherwise get something else.

[mike@x-ph.com]

Originally Posted by six75LT

one thing to consider is delivery time. if you want to wait a year to get your exhaust then get the AA EL, otherwise get something else.

EL are scheduled to arrive in stock at the end of this month

[Tommy L Garage]

I’ve tried multiple exhaust setups on my car and drove a bunch. Here is my takeaway (personal opinion only):
1. Stock downpipes, single AA midpipe and Akra (or dinan) muffler. Perfect sound and zero drone. Also no annoying farts.

2. EQual Length midpipe: annoyingly raspy and high-pitched. Some love it, I do not.

3. Catless downpipes will drone. No matter what.

[mikey914]

Originally Posted by Tommy L Garage

I’ve tried multiple exhaust setups on my car and drove a bunch. Here is my takeaway (personal opinion only):
1. Stock downpipes, single AA midpipe and Akra (or dinan) muffler. Perfect sound and zero drone. Also no annoying farts.

2. EQual Length midpipe: annoyingly raspy and high-pitched. Some love it, I do not.

3. Catless downpipes will drone. No matter what.

Have you heard my exhaust? Where is it raspy and high pitched? This probably one of the deepest sounding exhausts that exists on the f80 the way I have it setup. AND I’m completely catless.

Ssr catless Downpipes, aa equal length with custom resonators and awe switchpath axleback.

Pretty sure this is one of the best sounding exhausts ever to be heard on the f80

[RugbyBro]

Stench: need cats, no way around this

Drone: I would suggest trying the stock muffler w/ a valve controller. If you force the valves open it’s effectively a straight pipe and will sound pretty much like every other valved/straight thru muffler design and you’ll get the full thunder whenever you’re in the mood for it. With the valves in OE mode, they’ll be closed while cruising in sport/sport+ and open when you dig into the pedal. The stock muffler is really incredible at eliminating drone. If you still have it then it’s worth a shot cause it’s free.

As for UEL vs EL, just decide fundamentally what sound you like better (traditional I6 or stock M4) . Either option can sound like a tinny/raspy mess if not paired correctly. I would say stock DPs, Single or Equal Mid, and stock muffler w/ valve controller have resulted in the best sounding exhaust setups. No need to spend money anything else aside from a midpipe and valve controller if you’re only looking for sound IMO.

[Redline Fanatix]

Originally Posted by Tommy L Garage

I’ve tried multiple exhaust setups on my car and drove a bunch. Here is my takeaway (personal opinion only):
1. Stock downpipes, single AA midpipe and Akra (or dinan) muffler. Perfect sound and zero drone. Also no annoying farts.

2. EQual Length midpipe: annoyingly raspy and high-pitched. Some love it, I do not.

3. Catless downpipes will drone. No matter what.

100% agree. I've heard the AA single / Dinan Axle back combo in person and it sounds awesome. Looking to source a dinan myself to pair it to my single AA.

[1000hp]

Originally Posted by mikey914

Have you heard my exhaust? Where is it raspy and high pitched? This probably one of the deepest sounding exhausts that exists on the f80 the way I have it setup. AND IÂ’m completely catless.

Ssr catless Downpipes, aa equal length with custom resonators and awe switchpath axleback.

Pretty sure this is one of the best sounding exhausts ever to be heard on the f80

We have all heard your exhaust because you have posted your video about 147 times in the past week

It sounds awesome. I love it.

I have heard other cars with AA EL that sounded raspy as shit. Probably the ones with catless downpipes and no resonators. I don't think anything sounds good with a straight pipe. Certainly not anything with an S55.
The single mid kills all of the rasp and makes the tone a little deeper, but that's about it in my opinion. Still makes the same shit sound.

[TouringM3]

When i bought my F80, it was used, and already had the AWE Switchpath (resonated exhaust) - it is actually one of the reasons I bought this car.

I absolutely love how the exhaust sounds, valves closed and valves open.
With the catless downpipes, this thing can get ROWDY, also

[m4h2o]

Can i still use corn while having stock downpipes?

[TopJimmy]

Originally Posted by m4h2o

Can i still use corn while having stock downpipes?

Yes, E is no probs.

With stock cats just don't burble agg above 3 (if at all).

[m4h2o]

Originally Posted by TopJimmy

Yes, E is no probs.

With stock cats just don't burble agg above 3 (if at all).

Good to know ty

[No_curebimmer]

Originally Posted by 1000hp

I have stock downpipes, AA equal length mid, and Dinan muffler. Zero drone after shutting off cold start with BM3. Not loud with the resonated mid. Can be louder with non-resonated mid. No rasp. No smell.

Would you be able to comment on how the installation went? I have an M2C with non-rez AA EL, and ran into this setup that I am trying to duplicate, which should be similar to yours, especially if you removed the burbles:

Questions:

- did you use the Dinan muffler only or the x-pipe as well?
- how difficult was the installation? Clearly, having an AA EL changes the 'stock' mating points, so any aftermarket axleback would be a challenge
- any idea if I could use the M4 Dinan axleback in my M2C? Dinan has totally different exhausts for the M3/M4 compared to the M2C.

Any input is appreciated, AA EL - Dinan axleback combos are very rare, especially for the M2C platform. IMO, this setup is the best, but I certainly don't wish to spend a fortune on custom piping just to make this work.

Thanks for the input/help!

[Jbonly21]

M performance exhaust with secondary cat delete.

BMW F80 M3 M Performance Exhaust Secondary Cat Delete

[SteveandSasha]

I love my Akrapovic

[hellokitty]

Originally Posted by SteveandSasha

I love my Akrapovic

+1… Akra is a one and done type system