[ul2mitt]

Originally Posted by lsturbointeg

so i'm guessing my wife is going to blow her lid when i put the Meisterschaft on than

She will definitely be upset but hopefully ends like mine with it's your car so do what you want!

[lsturbointeg]

Originally Posted by ul2mitt

She will definitely be upset but hopefully ends like mine with it's your car so do what you want!

LOL she's cool like that!

[lsturbointeg]

Originally Posted by Hasser

well, she wont be blowing you after you fit the exhaust

[asegal85]

Anybody with an M performance exhaust system in the San Diego area willing to give me a 2 min joy ride to determine if I should get it? I'm concerned that the cabin noise will be too high during day-to-day driving and WIFE will not be happy. LMK
Al

[Uclafan85]

That's awesome! I was supper happy with my muffler delete, no drone and it sounds great. A lot of the guys running the M sport ex. Have asked what I got put on but it's just a muffler delete with factory tips welded in place

[ThaiBruin]

Originally Posted by asegal85

Anybody with an M performance exhaust system in the San Diego area willing to give me a 2 min joy ride to determine if I should get it? I'm concerned that the cabin noise will be too high during day-to-day driving and WIFE will not be happy. LMK
Al

If you're ever in West LA, you could go for a ride. I love the exhaust PRIMARILY because it doesn't annoy the shit out of my wife. Drive normal, and it's only a hair louder than stock. Get on it, then she sings a lot more. There's ZERO drone.

[Surly73]

Originally Posted by ThaiBruin

If you're ever in West LA, you could go for a ride. I love the exhaust PRIMARILY because it doesn't annoy the shit out of my wife. Drive normal, and it's only a hair louder than stock. Get on it, then she sings a lot more. There's ZERO drone.

Which M PE part number do you have installed? There were two revisions for the F10 535.

[ThaiBruin]

Originally Posted by Surly73

Which M PE part number do you have installed? There were two revisions for the F10 535.

The attached picture is what was on my invoice.

[Surly73]

Originally Posted by ThaiBruin

The attached picture is what was on my invoice.

[ThaiBruin]

Originally Posted by Surly73

Any idea what revision mine is? I purchased it October of last year (2016).

[addy27]

Have to admit, this does sound nice on the 535i. I was test driving a brand new/left over deeply discounted 535i at the dealer near me and it came with the M Perf Exhaust installed and the sound was definitely noticeable inside.

[Surly73]

My 535i PE kit is the earlier version: 18-30-2-293-447 (kit part#)

[ThaiBruin]

Originally Posted by Surly73

My 535i PE kit is the earlier version: 18-30-2-293-447 (kit part#)

Any idea what they changed with each revision?

[Surly73]

Originally Posted by ThaiBruin

Any idea what they changed with each revision?

I've been on a (low priority) quest to determine that for years. The only thing I ever found was a German document saying that the change was all about the tips. The old model bundled chrome tips and the new didn't, allowing buyers to spend more on titanium, carbon fiber etc...

I have a theory that the existence of two models explain why some owners say "my wife can't even tell the difference with the windows up and absolutely zero drone" and others experience 1.75-2.25k drone on the highway. Generally, owners don't pay attention to which one they have - they're all just "M PE for 535i". I have been unable to collect enough data from owners to make a conclusion.

If I ever find the newer version for sale locally to me second hand for a good price I will buy it, compare, and keep one. You'll see me chime in to some for sale threads asking "which one?".

[ssgm1x]

Originally Posted by Surly73

Ok. At 60mph I can clearly hear a difference with the windows up. To the point that it's obscuring low frequencies on the radio (at fairly low volume - kids in the car). If I let off the throttle then the "drone" goes away and I can hear things normally. The extra throttle on an uphill (still in 7th or 8th) gets annoying.

The problem is that describing things over the Internet is so subjective. Your character and finesse might be my "annoying" when it comes to highway cruising. In town I love it. No problem windows up or down. I still preferred the character of the Dinan exhaust on my E39 528i (partially design difference, partially the fact that it was one exhaust fed by all six cylinders instead of two 3 cylinder mufflers, partially the naturally aspirated character).

I think I'm going to get back under and check some stuff. I did not get the BMW clamps with mine but I got high quality stainless sleeve clamps of what I thought were the right diameter and tested them out on the muffler tubing before doing the job. I wonder if something is a little amiss. I'll post pics of my clamps when I'm not on my phone.

I was considering MPE but def do not want drone. Especially for that Price....

[thakid22]

It is well known that there are two versions of the MPE.
However, I think there is another issue that is effecting drone too.
Not all N55 engines are the same. Early 535i models feature a pneumatic wastegate (PWG) like the N54 models used. Then, starting with 07/2014 production, BMW switched the 535i to an Electronic wastegate (EWG) design.

I’d be willing to bet that the change in design also came with modified watergate programming/behavior in the ECU. This could easily account for why some people have drone and others not.

In addition, BMW adjusts various ECU parameters through software updates. These update could have made the drone more or less appearant over the years.

[Surly73]

Originally Posted by thakid22

It is well known that there are two versions of the MPE.
However, I think there is another issue that is effecting drone too.
Not all N55 engines are the same. Early 535i models feature a pneumatic wastegate (PWG) like the N54 models used. Then, starting with 07/2014 production, BMW switched the 535i to an Electronic wastegate (EWG) design.

I’d be willing to bet that the change in design also came with modified watergate programming/behavior in the ECU. This could easily account for why some people have drone and others not.

In addition, BMW adjusts various ECU parameters through software updates. These update could have made the drone more or less appearant over the years.

I'm with you on the two designs (although you are the first person I've encountered other than myself who considers it "well known"), but according to my data the change doesn't line up with the change from PWG to EWG.

The change in MPE was 2012, I believe, with the first version only being used in 2011 and part of 2012. The second version has been "current" since then for the rest of the life of the F10 535.

My PWG 535xi has had the 2011 factory software, 2015 software and just got brand new software about a month ago. I noticed no change in exhaust sound with the first two software versions. I go back to factory mufflers for the winter and haven't put my MPE back on yet. I did notice a change in the stock exhaust sound of the most aggressive shift profile (only) since the brand new software and I'm interested to see how the sound has changed with the MPE.

[thakid22]

Originally Posted by Surly73

I'm with you on the two designs (although you are the first person I've encountered other than myself who considers it "well known"), but according to my data the change doesn't line up with the change from PWG to EWG.

The change in MPE was 2012, I believe, with the first version only being used in 2011 and part of 2012. The second version has been "current" since then for the rest of the life of the F10 535.

My PWG 535xi has had the 2011 factory software, 2015 software and just got brand new software about a month ago. I noticed no change in exhaust sound with the first two software versions. I go back to factory mufflers for the winter and haven't put my MPE back on yet. I did notice a change in the stock exhaust sound of the most aggressive shift profile (only) since the brand new software and I'm interested to see how the sound has changed with the MPE.

I wasn’t saying that EWG or PWG had their own MPE part numbers.
I was suggesting that the same MPE might sound slightly different based upon if it was fitted to an EWG model or a PWG model.


Keep us posted on what you experience with your new software when you go back to the MPE.

[Surly73]

Originally Posted by thakid22

I wasn’t saying that EWG or PWG had their own MPE part numbers.

I didn't think you were saying that, but I *did* think you were saying that the MPE switch happened the same as the EWG switch. Sorry.

Keep us posted on what you experience with your new software when you go back to the MPE.

Will do. I haven't really run across anyone else who observes the three main shift programs (not RPM shift points, but shifting programs) used by the transmission either. It's very obvious with MPE. I think I hear some changes to the fastest one.

[xXRAGHAVXx]

Originally Posted by johnnya

There was an issue when they first installed it. When they cut the original exhaust they didn't fix the clamp correctly and it was leaking and making a louder sound exterior and I guess you can call it drone in the inside. When they fixed it, the cabin is very quiet, city, highway... No complaints. I'm from Canada so my price doesn't make sense for you guys but do a quick search on google and I'm sure you will find a very decent price in. The USA

The part number for the exhaust is 18-30-2-354-362

Do you know how they fixed the drone?

[xXRAGHAVXx]

Originally Posted by Surly73

I'm in Canada too. I know that I didn't forget to clamp anything, and the clamps are centered fore / aft, and the tips end up pretty much where they should. I don't hear anything that sounds to me like an accidental leak not going through the muffler.

I guess maybe I should check it all again - who knows. I'd love to lose the drone.

I did buy mine second hand - I suppose there's a Chance the original owner modified it somehow but he was pretty clear he didn't (and didn't seem the type)

So are you saying that at 60mph in D (high gears, low revs) you can't tell the difference between stock and m performance with the windows up? I definitely can, but it's not obnoxious, but I'd rather it was gone. I'm actually considering going stock when my snow tires are on....

Hmmmm

Did you figure out why it droned?

[vasanth79]

I installed M Performance Exhaust on a 2014 BMW 535I xDrive yesterday and it sounds like the 2007 BMW 335I I had before. I now have to wait to see what my wife has to say.