[neilvan]

Originally Posted by hassmaschine

Huh, I had no idea there was a difference in diameters. Also the 330i has the DME controlled exhaust flap - lots of guys try to force it open all the time, not realizing it is always open if you're going more than like 5mph anyway.

Just please don't be the guy with the muffler delete and burble tune.. ugh. It's like 1999-2002 is repeating all over again, only back in the day it was the Civics with fart can mufflers.

Oh jesus no, I cant stand muffler deletes at all. If it was easy Id try wiring the flap up but it turned out to be a total pain.

My brother, being a real estate agent, wanted an OEM+ exhaust without it being annoying or any drone. His is a secondary cat delete +330 resonator back and flap always open. Honestly it could pass for a 'stock' sport option exhaust but when compared side be side with a 328 you can absolutely tell the difference.

Originally Posted by CTinline-six

Yeah I found a 330 muffler on ebay for cheap so I'm going to try it. I don't want anything loud, just slightly better than the 328.

We tried a 330i muffler alone but the piping between the res and muffler was different(diameter+path) so we would have had to get a muffler shop make an adapting pipe.

For us $30 at a u pick yard and a resonator back complete was so much easier. (they cut the cats out there) so decat his current one and weld up some straight pipe/clamps and its an easy swap

Originally Posted by E92_William

Has anyone opened the resonators and compared them?

I did lots of picture searching and seeing them both open I could spot 0 differences. My guess is the only difference is the outlet is 65mm vs 70mm for the pipe to the muffler

[Hotter]

Originally Posted by neilvan

Id recommend deleting the secondary cats or using a header and getting the best of it all.

Wont that make the car too laud?
What are the pros and cons of secondary cats delete?
Will it pass emissions tests? - which is my biggest concern

[neilvan]

Originally Posted by Hotter

Wont that make the car too laud?
What are the pros and cons of secondary cats delete?
Will it pass emissions tests? - which is my biggest concern

Not really. 330 res back + secondary delete (kept factory headers) isn't loud at all. Its still the stock e90 muffler; no pops/bangs/nonsense. It just changes it from a lame quiet hum to an actual 6 cyl exhaust note; 0 drone still (compared to 328 w/ all cats)

Secondary cats are just an extra restriction; some have said 3-5whp gain and a bit more sound/tone from the car.

You are in Europe so depending where you may have never even had 2nd cats on your car and all depends on your emissions tests where you are

[CTinline-six]

My N51 car has larger pipe from the resonator to the muffler than the N52. Not sure if it is the same size as the 330i, but should make adapting the muffler a bit easier.

The secondary cats don't have sensors, so removing them shouldn't impact emissions tests or throw a check engine light, but good luck finding a shop to remove them if you can't do it yourself. Most around here won't even touch cat convertors unless you are replacing them.

For mine I'll stick the 330 muffler on and see how the sound compares. Might delete the resonator, but that's probably the most I'll do. I'm not looking for loud. A friend's E90 has just a Magnaflow muffler and the drone inside is pretty bad when driving in the hills. I'd also like to retain as much of the factory exhaust as I can, since aftermarket stuff unless top quality stainless will rust out in a year with our salty roads.

[Hotter]

Originally Posted by Hotter

I have found the exhaust from E90 330i N52 190kw 2006. Real OEM shows that piping is the same across E9x, but for some reason rear muffler itself code is different for E90/E91 and E92/E93. Will E90 muffler be ok on E92?

So I bought this E90 muffler 7534342, I do not find it in realoem. I read that only tips are different length E90 vs E92? other than that mufflers are the same?

[bluewater328]

Originally Posted by Hotter

So I bought this E90 muffler 7534342, I do not find it in realoem. I read that only tips are different length E90 vs E92? other than that mufflers are the same?

I mean, this looked like a pretty good explanation to me

https://www.bimmerpost.com/forums/sh...php?p=27507601

[Hotter]

I have installed E90 330i N52 190kw 2006 muffler to my E92 328i. The pipe diameter is 65mm on it so it matched 328i. Maybe 200kw models have this 70mm?

I did not remove secondary CATs. My question are:
Does EU E9x 3xxi come without secondary CATs? Are secondary CATs only for US market?

Also muffler seems to be louder, at least on idle it makes some kind of drone with flap open. If I close the flap its quitter, but I did not install flap closing mechanism. I will need to use car more and see if I like it or not.

[BudVlad]

Originally Posted by Hotter

I did not remove secondary CATs. My question are:
Does EU E9x 3xxi come without secondary CATs? Are secondary CATs only for US market?

EU E9x have secondary CATs. I replaced my exhaust with Supersprint CATless exhaust and I passed emission with no problem.

[neilvan]

Originally Posted by Hotter

I have installed E90 330i N52 190kw 2006 muffler to my E92 328i. The pipe diameter is 65mm on it so it matched 328i. Maybe 200kw models have this 70mm?

I did not remove secondary CATs. My question are:
Does EU E9x 3xxi come without secondary CATs? Are secondary CATs only for US market?

Also muffler seems to be louder, at least on idle it makes some kind of drone with flap open. If I close the flap its quitter, but I did not install flap closing mechanism. I will need to use car more and see if I like it or not.

Very interesting that that the 65mm clamp worked. 100% on the muffler I had and the res back I got both were 70mm (O.D btw) (North America only got the 255hp version and only the sedan)

Only some select euro countries had no secondaries (PA4 vs PA5 versions or something like that).

Drone is usually resonance while driving(highway speed), There will be more volume at idle and thru the rpm as its less restrictive.


EDIT: I figured it out they made both dias for the 330 https://www.realoem.com/bmw/enUS/sho...diagId=18_0589

realoem shows both exhaust diameters under the same part number; odd

[Hotter]

So I had a good offer on 328i Performance Exhaust muffler (1810-2208794) and will install it next week.

I wonder what is the difference between 328i PE (1810-2208794) and 330i PE (1810-2208791)?

Also is 328i PE better than 330i stock exhaust?

328i PE seems to be much heavier (Weight: 17894.000 kg) than any other PE/stock exhaust. What did they put in it? Performance exhaust should be lighter?..

[E92_William]

Do you want to be a great asset to the forum and cut it open to find out?

[Hotter]

Originally Posted by E92_William

Do you want to be a great asset to the forum and cut it open to find out?

Judging by the weight it might be something like this:


Not sure if I am willing to open it, I will try to weight and compare it with stock 330i exhaust.

[Hotter]

Also I got only PE muffler without the middle pipe which removes resonator. What would be pros/cons removing resonator? Will PE be ok with resonator?

Is it possible to buy this mid-pipe alone somewhere?


P.S. I think weight (Weight: 17894.000 kg) is for entire system with middle pipe. So maybe muffler itself is like ~12Kg. Still could be lighter...

[Hotter]

Just installed PE muffler. It seems that its not that heavy, I guess weight in RealOEM is with pipes and mounts. Its not too loud, actually its quite silent, just deeper lower tone, you cant hear it inside, you need to open windows to hear it. I even want louder... Would like to get mid-pipe also without resonator.

Does anyone know if its possible to buy mid-pipe somewhere?

Originally Posted by Hotter

[mapleleaf1773]

It would be cheaper to cut out the resonator and put a y pipe in than source that pipe oem.

If thats what you want.

[Hotter]

Originally Posted by mapleleaf1773

It would be cheaper to cut out the resonator and put a y pipe in than source that pipe oem.

If thats what you want.

This part does not seem to be sold separately by OEM. And it has a lable that its certified, without that label I might not pass car inspection, thats why I would like OEM.

[mapleleaf1773]

I gotchya, understandable

[neilvan]

IIRC the non-res midpipe was only available in north america and as part of the full exhaust system.

Europe had a muffler only but it included the muffler flap as part of it (north american versions never had that).

The difference on realoem for your part numbers is the 328 one is north american cars and the 330 is euro

[Hotter]

Originally Posted by neilvan

IIRC the non-res midpipe was only available in north america and as part of the full exhaust system.

Europe had a muffler only but it included the muffler flap as part of it (north american versions never had that).

The difference on realoem for your part numbers is the 328 one is north american cars and the 330 is euro

And what about internals?
PE of 328i and 330i are the same except that 330i has flap and 328i has mid-pipe? other then that they should be the same?
Interesting that Europe did not have mid-pipe, Europe muffler is less restrictive and louder to compensate mid-pipe?

[neilvan]

Originally Posted by Hotter

And what about internals?
PE of 328i and 330i are the same except that 330i has flap and 328i has mid-pipe? other then that they should be the same?
Interesting that Europe did not have mid-pipe, Europe muffler is less restrictive and louder to compensate mid-pipe?

No one knows what's inside of the NA PE muffler; I've only seen pics of the euro one but I cant see them being too much different.

My guess is its just laws/regulations that allowed what BMW could legally sell. The Euro PE sounds very similar to the PE mod mufflers Ive heard whereas the NA PE is louder and way more pops/bangs/rasp

[eljay]

Originally Posted by Hotter

Interesting part is that my exhaust on a 2009 328xi Touring is a solid pipe from the downpipe flanges to the muffler. There are no clamps along the way, yet on realoem, it shows that my build date has two clamps on the front of the mid pipe and one clamp in the rear.

[neilvan]

Originally Posted by eljay

Interesting part is that my exhaust on a 2009 328xi Touring is a solid pipe from the downpipe flanges to the muffler. There are no clamps along the way, yet on realoem, it shows that my build date has two clamps on the front of the mid pipe and one clamp in the rear.

BMW has those for replacement parts. Factory exhausts(downpipe/header back) are 1 piece but replacements come in sections.