[AhsanU]

Originally Posted by 2022m3x

I’m pretty new to this kind of stuff so sorry in advance if this is a dumb question.
Planning to do a resonator delete but am worried about warranty of the vehicle. From what I’m understanding, as long as I don’t touch the primary cats there shouldn’t be any warranty issues correct?
Also, would there be a specific department to call at my local bmw dealer or would I just ask my service advisor for warranty information like this?

Removing the primary cats found in the downpipes allows for more power, which BMW can attribute to if something really catastrophic happens, and even then - they'd have to prove that your removal of the cats is what caused any sort of issue. For example: if there's some issues with your suspension, they can't blame the catless downpipes for that.

Removing the resonators in the midpipe may introduce some power, but it's rather insignificant, so it's safe to say there wouldn't be any repercussions for removing them from a warranty standpoint.

BMW SA will say this: leave it stock, and don't touch anything if you care about your warranty. Many SA's are chill, and many are not - but at the end, if there's some serious warranty work that needs to be done, BMW does need to approve it and they will look to stiff you and blame whatever they can on the issue that will save them money. S55 crankhub stories haunt me sometimes, so I'm genuinely not interested in heavily modifying my upcoming G80 M3. Downpipe, midpipe, wheels, dropped ride height - that's it for me. No tune, no E85, no port injection for me.

The old saying goes - you pay to play. I think it's fair to say that BMW generally are okay with exhaust mods, but when it comes to messing with the ECU/introducing a piggyback that increases boost targets - you're in murky water. But there are loads of threads about warranties, including someone that claims to be a "BMW master tech", but this is the internet, and I can claim to be Batman if I wanted to, so be diligent in your research.

[2022m3x]

Thanks for all the responses! Planning on doing either both resonator deletes or a secondary cat/ first resonator delete. Just need to find the right muffler shop to do it.

[Steveo]

Can you please DM price for this, looks great!

Originally Posted by VonB

Here's another one to add y'all, single mid pipe from InkedCustom.

[Martinez831]

Originally Posted by m20e3087

Done. Sounds really good. Bubbles are bit louder, but not crazy as F8X gen. Zero drone on the highway.

Is this XPipe going through both resonators? Or just the last one closest to the muffler? I’m trying to go with the same setup but with Project Gamma Downpipes.

[Martinez831]

Originally Posted by m20e3087

Done. Sounds really good. Bubbles are bit louder, but not crazy as F8X gen. Zero drone on the highway.

Does this X pipe go through both resonators or just the last one closest to the muffler? I’m trying to go the same setup but with Project Gamma DPs

[LifesAnesthesia]

So the active Autowerks single midpipe...is that thing street legal?

[mike@x-ph.com]

Originally Posted by LifesAnesthesia

So the active Autowerks single midpipe...is that thing street legal?

Depends on your state laws. The midpipe keeps the primary cats and does not throw a check engine light

[LifesAnesthesia]

Originally Posted by mike@x-ph.com

Depends on your state laws. The midpipe keeps the primary cats and does not throw a check engine light

I'm in VA...just concerned about the rave affidavit, but otherwise I think it sounds great. Less rasp than the x pipe they offer, right?

[mike@x-ph.com]

Originally Posted by LifesAnesthesia

I'm in VA...just concerned about the rave affidavit, but otherwise I think it sounds great. Less rasp than the x pipe they offer, right?

Correct

[csayad]

Does anyone have sound clips of one resonator being deleted? I'm probably going to go with 1 resonator delete I'm just torn with resonator to go with whether it's the crossover section in the resonator or other one. Has anyone only done a secondary cat delete? Please if someone has sound clips drop below.

[ChrisM4]

Originally Posted by csayad

Does anyone have sound clips of one resonator being deleted? I'm probably going to go with 1 resonator delete I'm just torn with resonator to go with whether it's the crossover section in the resonator or other one. Has anyone only done a secondary cat delete? Please if someone has sound clips drop below.

I personally think the 2nd cat delete with leaving both resonators in is the way to go. You'll get a horsepower bump, more volume and should have zero drone / bad frequencies.

I wouldn't remove the rear resonator (closest to the back of the car) as that's the one with the merge in it. (Unless you put in an x-pipe)

[kz924]

After reading this thread, I went to a muffler shop and paid 200 dollars to cut the forward resonator out and welded in two straight pipes. I noticed a definite improvement in the engine sound and I don't think I want both resonators deleted. I think one resonator deletion is plenty. This work took all of 20 minutes to complete after I just walked in. Attached are some images of the front and rear resonator, resonator deleted, and then straight pipes welded in. Love it!

[TrentMeister]

Originally Posted by csayad

Does anyone have sound clips of one resonator being deleted? I'm probably going to go with 1 resonator delete I'm just torn with resonator to go with whether it's the crossover section in the resonator or other one. Has anyone only done a secondary cat delete? Please if someone has sound clips drop below.

Go to my insta or the videos I have posted on the original post

@coldboar.m4

[mike@x-ph.com]

Originally Posted by kz924

After reading this thread, I went to a muffler shop and paid 200 dollars to cut the forward resonator out and welded in two straight pipes. I noticed a definite improvement in the engine sound and I don't think I want both resonators deleted. I think one resonator deletion is plenty. This work took all of 20 minutes to complete after I just walked in. Attached are some images of the front and rear resonator, resonator deleted, and then straight pipes welded in. Love it!

What other mods do you have on the car?

[GixY2K]

Originally Posted by kz924

After reading this thread, I went to a muffler shop and paid 200 dollars to cut the forward resonator out and welded in two straight pipes. I noticed a definite improvement in the engine sound and I don't think I want both resonators deleted. I think one resonator deletion is plenty. This work took all of 20 minutes to complete after I just walked in. Attached are some images of the front and rear resonator, resonator deleted, and then straight pipes welded in. Love it!

20 minute?

- put car on lift
- cut pipes
- remove pipes (assuming this is needed for welding access?)
- weld pipes
- install pipes
- get car off the lift

That is amazing time!

[csayad]

Originally Posted by kz924

After reading this thread, I went to a muffler shop and paid 200 dollars to cut the forward resonator out and welded in two straight pipes. I noticed a definite improvement in the engine sound and I don't think I want both resonators deleted. I think one resonator deletion is plenty. This work took all of 20 minutes to complete after I just walked in. Attached are some images of the front and rear resonator, resonator deleted, and then straight pipes welded in. Love it!

Originally Posted by kz924

After reading this thread, I went to a muffler shop and paid 200 dollars to cut the forward resonator out and welded in two straight pipes. I noticed a definite improvement in the engine sound and I don't think I want both resonators deleted. I think one resonator deletion is plenty. This work took all of 20 minutes to complete after I just walked in. Attached are some images of the front and rear resonator, resonator deleted, and then straight pipes welded in. Love it!

Please add sound clips I'm debating what to do and I'm planning on doing it tomorrow or day after. I have lots of questions about this setup.

[ChrisM4]

Originally Posted by kz924

After reading this thread, I went to a muffler shop and paid 200 dollars to cut the forward resonator out and welded in two straight pipes. I noticed a definite improvement in the engine sound and I don't think I want both resonators deleted. I think one resonator deletion is plenty. This work took all of 20 minutes to complete after I just walked in. Attached are some images of the front and rear resonator, resonator deleted, and then straight pipes welded in. Love it!

What % increase in volume would you guess? Any drone anywhere in the rpm range, cruising etc? Looks like they did a really nice clean job.

[mzcp]

Originally Posted by kz924

After reading this thread, I went to a muffler shop and paid 200 dollars to cut the forward resonator out and welded in two straight pipes. I noticed a definite improvement in the engine sound and I don't think I want both resonators deleted. I think one resonator deletion is plenty. This work took all of 20 minutes to complete after I just walked in. Attached are some images of the front and rear resonator, resonator deleted, and then straight pipes welded in. Love it!

Do you have any sound clip? How much louder is the exhaust with just one resonator delete?

[akenation]

After reading all the 24 pages.

Every people talk about cost of custom exhaust mods.
after seeing every job here I can say :

To consider if it cheap or not its depend on a lot of thing.
people butchering oem stuff that worth a lot.

I see people putting mild metal (non stainless) mig welded on there butchering mid-pipe.

I saw the worst pipe bent on history to. You must go with mandrell bent. its 500 hp car...

So when compare your 200$ job to a 1500$ aftermarket mid-pipe you must know :

2 stainless flange at the beginning of the mid pipe cost 50$ each = 100$
good quality stainless piping is minimum 20-25$ by feet = 10 feet = 250$
good quality stainless 90 degré bent is 25-30$ each = you will need 5 = 150$
You will need seal clamp at the end of the mid pipe to be able to replace easily your stock non butchering oem mid-pipe = 30$ each = 60$
Now using good quality piping on a 100k car worth a TIG welder. you must weld your stainless tube with stainless weld ok?

a good timelap to do this job begining from the flange to te rear end wil take around 6 hours. 6hours x 80$ (cheap for a tig welding in pro garage) = 480$

so a good quality parts and preserve oem part will cost : 1040$ without calculate any x-pipe on it (200$)

There is the real price or quality job for your 100k$ car.

wish it could help people stop downgrade them car and looking for quality parts

[TrentMeister]

Originally Posted by akenation

After reading all the 24 pages.

Every people talk about cost of custom exhaust mods.
after seeing every job here I can say :

To consider if it cheap or not its depend on a lot of thing.
people butchering oem stuff that worth a lot.

I see people putting mild metal (non stainless) mig welded on there butchering mid-pipe.

I saw the worst pipe bent on history to. You must go with mandrell bent. its 500 hp car...

So when compare your 200$ job to a 1500$ aftermarket mid-pipe you must know :

2 stainless flange at the beginning of the mid pipe cost 50$ each = 100$
good quality stainless piping is minimum 20-25$ by feet = 10 feet = 250$
good quality stainless 90 degré bent is 25-30$ each = you will need 5 = 150$
You will need seal clamp at the end of the mid pipe to be able to replace easily your stock non butchering oem mid-pipe = 30$ each = 60$
Now using good quality piping on a 100k car worth a TIG welder. you must weld your stainless tube with stainless weld ok?

a good timelap to do this job begining from the flange to te rear end wil take around 6 hours. 6hours x 80$ (cheap for a tig welding in pro garage) = 480$

so a good quality parts and preserve oem part will cost : 1040$ without calculate any x-pipe on it (200$)

There is the real price or quality job for your 100k$ car.

wish it could help people stop downgrade them car and looking for quality parts

Expensive or not it sounds the same.

I'm not going to own this car for more than 3 years and when it's time to trade/sell I'll just give the parts to the dealership and let them figure it out like my cars in the past.

If you feel like paying for expensive parts on areas of the car no one sees, more power too ya.

Just seems like a waste of coin imo

[m20e3087]

Originally Posted by TrentMeister

Expensive or not it sounds the same.

I'm not going to own this car for more than 3 years and when it's time to trade/sell I'll just give the parts to the dealership and let them figure it out like my cars in the past.

If you feel like paying for expensive parts on areas of the car no one sees, more power too ya.

Just seems like a waste of coin imo

Plus 2. I am sure if you can afford $80-$90K car, you can afford $1500-$2000 midpipe or $5K full system. But if we can get the 90% of the same sound by spending $200-$600, why the heck not. Sure it's not pretty as the whole system, but it's 100% effective. I like to spend my money where quality parts matter.

[Vic55]

Originally Posted by m20e3087

Plus 2. I am sure if you can afford $80-$90K car, you can afford $1500-$2000 midpipe or $5K full system. But if we can get the 90% of the same sound by spending $200-$600, why the heck not. Sure it's not pretty as the whole system, but it's 100% effective. I like to spend my money where quality parts matter.

And who cares what it looks like underneath as long as the welds are done correctly. Id like to see someone show me that an expensive hack job vs the one Trent did will yield better sound and better performance because it wont. Its just someone who probably wasted their money and then had to waste their time and ours telling us what we should do with our cars.

LOL.