[Pantagathus]

Originally Posted by McLaren720s

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

[Patton250]

Originally Posted by Pantagathus

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

Why is going with PSI expensive? Because of shipping??

[Pantagathus]

Originally Posted by Patton250

Why is going with PSI expensive? Because of shipping??

It's $1,500 from memory, vs doing an equivalent at your local shop is probably a few hundred.

[Patton250]

Originally Posted by Pantagathus

It's $1,500 from memory, vs doing an equivalent at your local shop is probably a few hundred.

I see. I’m pretty ignorant about these things and no nothing of what they cost. I know a good friend of mine who owns the 2020 M2 you see in my picture spent $4500 on his exhaust. I don’t mind spending the money I just want it to sound right. My MB 2016 C450 had a much better sounding exhaust. What’s up with that?

So if money is no object what is the best exhaust you can install in one of these to give you the best sound but yet you still can cycle the valves be able to dampen it down by pushing the button in the cockpit?

[Pantagathus]

Originally Posted by Patton250

I see. I’m pretty ignorant about these things and no nothing of what they cost. I know a good friend of mine who owns the 2020 M2 you see in my picture spent $4500 on his exhaust. I don’t mind spending the money I just want it to sound right. My MB 2016 C450 had a much better sounding exhaust. What’s up with that?

So if money is no object what is the best exhaust you can install in one of these to give you the best sound but yet you still can cycle the valves be able to dampen it down by pushing the button in the cockpit?

The "$4.5k exhaust" is likely really different to what we're talking about with PSI, or a resonator delete or anything like that. All PSI did was hack out the secondary cats & resonators and weld in some replacement pipes, it's just a delete not a new exhaust or anything like that, I don't think you'd even really count if as a performance upgrade, it's just getting some fairly cheap extra noise. I think everything that has been discussed in this thread is a variation of that (just deleting a resonator or equivalent, which is dead simple). An actual exhaust system (e.g the MPE or Akrapovic exhausts) are systems that include new mufflers, tips etc. That's a whole other price point

[moproblems]

Originally Posted by Pantagathus

The "$4.5k exhaust" is likely really different to what we're talking about with PSI, or a resonator delete or anything like that. All PSI did was hack out the secondary cats & resonators and weld in some replacement pipes, it's just a delete not a new exhaust or anything like that, I don't think you'd even really count if as a performance upgrade, it's just getting some fairly cheap extra noise. I think everything that has been discussed in this thread is a variation of that (just deleting a resonator or equivalent, which is dead simple). An actual exhaust system (e.g the MPE or Akrapovic exhausts) are systems that include new mufflers, tips etc. That's a whole other price point

They built a new midsection. With how this system works and the direct pass through on valves open I personally don't see a reason for a muffler swap unless you want your wallet to be lighter. Will be interested in seeing what people do with aftermarket resonators with no cats (both primary and secondary) mostly for sound. A true dual 2 3/4 system from the factory especially with oval piping around the diff is already good for decent power. Even with the stock resonators in place, there is very little restriction with the valves open other than catalytic convertors. I could see running stepped downpipes primarily for spool (look at vorschlag's offering for VW MQB) helping quite a bit.

[TrentMeister]

@Vic55

And here we have both secondary's resonators deleted and xpipe.

[Patton250]

Originally Posted by LBbluem2

@Vic55

And here we have both secondary's resonators deleted and xpipe.

That sounds totally awesome. Is that what psi is doing? I don’t really understand what secondary resonators mean.

[Vic55]

Originally Posted by LBbluem2

@Vic55

And here we have both secondary's resonators deleted and xpipe.

Thanks man, so Bro did it clean? Ill have to go see them Thursday.

Whats the gain on sound with the seconds out?

Edit: do you have pic of the piping layout by chance?

[TrentMeister]

Originally Posted by Vic55

Thanks man, so Bro did it clean? Ill have to go see them Thursday.

Whats the gain on sound with the seconds out?

Edit: do you have pic of the piping layout by chance?

I don't, he dropped the car before I had a chance to scope out his craftsmanship.

Volume and tone wise this thing actually has personality now and for me is exactly as rowdy is I like it.

Burbles are sick now, much close to how my m2c was. It's also nice you can turn them all them all the way off if you want with the exhaust button.

The mid range has a lot more beef to it and the top end honestly seems about the same but louder.

The bottom end is savage now especially when you do 1-2-3 short shifts wide open.

I think this is 100% the move to do.

I have the BMS valve controller in the mail so I can close the valves for the highway because there is definitely drone now especially if you let the car shift itself.

400$ altogether for what I'd call perfect sound.

[TrentMeister]

Originally Posted by Patton250

That sounds totally awesome. Is that what psi is doing? I don’t really understand what secondary resonators mean.

Secondary's are the second set of cats that have no sensors.

And basically yeah exactly what psi has for a 1/3 of the cost

[vetteflier]

Having wired the flaps open at all time, I'm pretty happy with the sound. Burbles have definitely picked up. Personal taste, but the "cracking" exhausts sound Ricer. I would definitely go for a muffler delete, Res only, as my B&Bs had on my C6 Vettes. Cats left alone. Loud--as no mufflers, but Resonators tuned the sound nicely. NPP on my C7 with fuse pulled also sounded great. But, no turbo 6 is ever going to sound like a 6.2 liter V8. Still...always room for improvement.

[TrentMeister]

Originally Posted by vetteflier

Having wired the flaps open at all time, I'm pretty happy with the sound. Burbles have definitely picked up. Personal taste, but the "cracking" exhausts sound Ricer. I would definitely go for a muffler delete, Res only, as my B&Bs had on my C6 Vettes. Cats left alone. Loud--as no mufflers, but Resonators tuned the sound nicely. NPP on my C7 with fuse pulled also sounded great. But, no turbo 6 is ever going to sound like a 6.2 liter V8. Still...always room for improvement.

You can turn the burbles off with the button

[Patton250]

Originally Posted by LBbluem2

You can turn the burbles off with the button

I would prefer to not have burbles. Don’t get me wrong they are kind of cool for about 15 minutes. Then they get annoying. Popping and banging and burbles. I would just prefer a bad ass rumble sound that I could make louder by opening the valves and dampen them by closing the valves. Any advice as to how to achieve this would be greatly appreciated and I would be glad to buy your dinner. :-)

[TrentMeister]

Originally Posted by Patton250

I would prefer to not have burbles. Don't get me wrong they are kind of cool for about 15 minutes. Then they get annoying. Popping and banging and burbles. I would just prefer a bad ass rumble sound that I could make louder by opening the valves and dampen them by closing the valves. Any advice as to how to achieve this would be greatly appreciated and I would be glad to buy your dinner. :-)

So the second half of the video I turn'd burbles off.

Also as soon as my BMS valve controller I'll have an idea if valves open burbles off is possible.

Currently with my setup the valves are open always.

If you press the exhaust button it turns off/down asd and turns burbles completely off.

I also think the down shifts are a little bit faster and more crisp with the exhaust button off so that's a bonus.

[FISH22]

LBbluem2, seriously appreciate all the videos and info in this thread! Car sounds damn perfect!

[Der_Wolf]

https://www.bimmerpost.com/forums/sh...php?p=27752341

LBbluem2
warcity
brooklyng80
luico1188

[Patton250]

Originally Posted by Der_Wolf

https://www.bimmerpost.com/forums/sh...php?p=27752341

LBbluem2
warcity
brooklyng80
luico1188

This link says it’s only for the F8X. Am I reading that correctly?

[Der_Wolf]

Originally Posted by Patton250

This link says it’s only for the F8X. Am I reading that correctly?

You're right. I assumed it was a typo because it was in the G8x forum, but the more I read it the more I think it was just placed in the wrong forum . Mike did say in one of these threads that AA was coming out with a mid pipe solution for the G8x, so there is still hope, but we need clarification.

[Patton250]

Originally Posted by Der_Wolf

You're right. I assumed it was a typo because it was in the G8x forum, but the more I read it the more I think it was just placed in the wrong forum . Mike did say in one of these threads that AA was coming out with a mid pipe solution for the G8x, so there is still hope, but we need clarification.

I would absolutely jump all over this mid pipe or a complete exhaust if it meets my criteria.

1. No burbles or pops or at least very little
2. A much louder exhaust sound then stock
3. Valves still work and dampen the sound
4. Doesn’t void power train warranty

I would love to drop some coin on this.

[Der_Wolf]

Originally Posted by Patton250

I would absolutely jump all over this mid pipe or a complete exhaust if it meets my criteria.

1. ̶N̶o̶ MORE burbles or pops or at least very little
2. A much louder exhaust sound then stock
3. Valves still work and dampen the sound
4. Doesn’t void power train warranty

I would love to drop some coin on this.

FTFY

[Patton250]

Originally Posted by Der_Wolf

FTFY

Well it’s fine the way it is now. It just needs to be louder!!