Make M4 ZCP Exhaust louder

[svr21]

Hi guys, I recently took delivery of my 2018 M4 Competition without the m performance exhaust.
I feel like my car is not loud enough even in sport plus, are there anyways to make it louder while still having the pops and burbles. I noticed the AA mid pipe but the thing is, I am only willing to spend $500 MAX.
I appreciate all the suggestions in advance.


What do you guys think about a cat/muffler/resonator delete

[ntg44]

Searching is your friend. You can start with unplugging your exhaust valves so they stay permanently open. Plenty of threads on how to accomplish this. And it's free. Probably the best free mod you can do, at least to start.

[cwazy1]

Originally Posted by svr21

I feel like my car is not loud enough even in sport plus

Unplugging flaps is not going to satisfy the OPs challenge.

AA midpipe is also not going to make your exhaust louder. It merely refines the sound. You gain MAYBE 5% volume.

The options you listed above being remove the cats/resonator will just decrease the actual quality of the sound. I would be hesitant to do this.

If it were me, I'd look on the classifieds for a used system locally. It'll probably run around 2k$.

[six-n-twins53]

Why do you have a roughly 80k car with a 500 dollar exhaust budget? I'd recommend saving for a proper exhaust. Or maybe looking for a car that allows for funding for modifications. Buy once, cry once

[ntg44]

Given the $500 constraint, I'm not sure there is a better solution than unplugging the valves. This engine's exhaust note is pretty audibly challenged, although I think at stock it's pretty decent. For me, unplugging the valves made a considerable difference. But then again I'm over my racecar days, got sick of the droning. If you just want your car louder in general, I think you're better off getting a SSR intake at that price. Loved mine, and to me it sounded way better hearing the turbo noises than any exhaust system I heard. Good luck OP.

And to six-n-twins, although I totally agree with you, have you tried selling anything on the classifieds on this forum? Some of the offers from the members here have the most hilarious lowballs I've ever come across haha. Just funny to see/hear about the other side of the argument when you aren't trying to sell something for what you think is a fair price.

[Bastiano]

I’m going to put the M Performance exhaust. To me it’s really nice and loud in sport and sport + mode. I saw a few on eBay for $3800 with free shipping. You don’t want a used one because I’ve heard so many complaints of them rusting out at the welds. I know it’s titanium but they’ve been rotting out pretty quickly. BMW gives the same warranty as the car or two years which ever is greater. They don’t bother repair them. They just replace them. I’m not big on the burbles and pops. Audi does this the worst. It sounds like the engine is broke and out of tune. But this sound is really popular these days. Ferrari’s V12 cars don’t have this. It’s just pure, raw and spine tingling sound. Just my .02 cents

[LOW4LYF]

Remus non resonated mid is damn loud on a ZCP...

[LOW4LYF]

Originally Posted by Bastiano

I’m going to put the M Performance exhaust. To me it’s really nice and loud in sport and sport + mode. I saw a few on eBay for $3800 with free shipping. You don’t want a used one because I’ve heard so many complaints of them rusting out at the welds. I know it’s titanium but they’ve been rotting out pretty quickly. BMW gives the same warranty as the car or two years which ever is greater. They don’t bother repair them. They just replace them. I’m not big on the burbles and pops. Audi does this the worst. It sounds like the engine is broke and out of tune. But this sound is really popular these days. Ferrari’s V12 cars don’t have this. It’s just pure, raw and spine tingling sound. Just my .02 cents

3800$ most likely without tips?

No, the do not rust... the exhaust cracks on the welds but there is a V2 version already.

[Bastiano]

Correct no tips. Is the new version just as good regarding sound?

[Ghetto2315]

Remove your stock resonator. Only do it if you have a tune that deletes your cold start.

If you don't, it will literally shake your house and neighbors house on cold start up.

Ask me how I know...

[overlook637]

Originally Posted by svr21

I am only willing to spend $500 MAX.
I appreciate all the suggestions in advance.

I don't know how to reply :/
What do you guys think about a cat/muffler/resonator delete

Cat delete if your ok with drone.

2nd cat replaced with resonators is the best bang for buck.

[six-n-twins53]

Originally Posted by ntgarage44

Given the $500 constraint, I'm not sure there is a better solution than unplugging the valves. This engine's exhaust note is pretty audibly challenged, although I think at stock it's pretty decent. For me, unplugging the valves made a considerable difference. But then again I'm over my racecar days, got sick of the droning. If you just want your car louder in general, I think you're better off getting a SSR intake at that price. Loved mine, and to me it sounded way better hearing the turbo noises than any exhaust system I heard. Good luck OP.

And to six-n-twins, although I totally agree with you, have you tried selling anything on the classifieds on this forum? Some of the offers from the members here have the most hilarious lowballs I've ever come across haha. Just funny to see/hear about the other side of the argument when you aren't trying to sell something for what you think is a fair price.

Lol as a matter of fact I have. Got a 100 dollar offer for a complete cf interior trim kit. I feel your pain brother!

[svr21]

Originally Posted by overlook637

Cat delete if your ok with drone.

2nd cat replaced with resonators is the best bang for buck.

Finally figure out how to reply
So delete the first cat and swap the second cat with a resonator? Sorry, I don't quite get it, doesn't that mean I will have two resonators?

[svr21]

Originally Posted by Ghetto2315

Remove your stock resonator. Only do it if you have a tune that deletes your cold start.

If you don't, it will literally shake your house and neighbors house on cold start up.

Ask me how I know...

I would love a crazy loud cold start, does that also make the car louder when running? I don't want to tune cuz I don't want to void my warranty.

[overlook637]

Originally Posted by svr21

Finally figure out how to reply
So delete the first cat and swap the second cat with a resonator? Sorry, I don't quite get it, doesn't that mean I will have two resonators?

The first cats are in the downpipe. non-catted downpipe would be above your budget since it would also need a tune/

The secondary cats are what most people replace with resonators or straight pipe. Less than 400$ for resonators to be swapped in.

The cheapest option is to unplug the muffler flap. It will keep flaps open. There are other aftermarket options for this as well.

[Bastiano]

Dinan is the only tune that will not void your manufacturers warranty. Their tunes are not really too expensive.

[LOW4LYF]

Originally Posted by Bastiano

Dinan is the only tune that will not void your manufacturers warranty. Their tunes are not really too expensive.

WRONG

[Bastiano]

There may be others that I do not know about....but Dinan definitely does not void your warranty with BMW.

[Ghetto2315]

Originally Posted by svr21

I would love a crazy loud cold start, does that also make the car louder when running? I don't want to tune cuz I don't want to void my warranty.

Yes it makes the whole car louder overall but I'm warning, it's LOUD during cold start with the valves open. Like a dragster at a drag strip loud lol

[ntg44]

Originally Posted by Ghetto2315

Yes it makes the whole car louder overall but I'm warning, it's LOUD during cold start with the valves open. Like a dragster at a drag strip loud lol

Are you referring to only the stock resonator? The AA midpipe removes the secondary cat and resonator, and people are saying it doesn't increase volume, but yet only removing the stock resonator makes it way louder? Would you mind elaborating by chance? Reason I ask is because I have an AA midpipe sitting in my garage, ready for install, but if it's going to be really loud then I'm not going to bother. Thanks.

[LOW4LYF]

Originally Posted by Bastiano

There may be others that I do not know about....but Dinan definitely does not void your warranty with BMW.

Yes it does, same as any othe tune.......








But Dinan has his own warranty which match the BMW warranty.

[svr21]

Originally Posted by Ghetto2315

Yes it makes the whole car louder overall but I'm warning, it's LOUD during cold start with the valves open. Like a dragster at a drag strip loud lol

I see, thank you!
Does deleting the resonator make weird noises like rattling and droning.