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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > BMW PE over the years...



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      01-16-2014, 03:51 PM   #1
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BMW PE over the years...

Hey everyone...

My quick history: Had BMW PE on my e92 a few years back. Loved it. But when I sold the car, I sold her with the PE. Anyways, picked up an e90 Msport and was running stock exhaust until yesterday when I had the PE installed. Again, love the exhaust note. Perfect tone inside and out for my taste at least. One thing I did notice was that I wasn't hearing that wonderful burble note as much this time around?! Four things came to mind:

(1) exhaust still new and may change after a bit more miles or (2) e90 versus e92 as the e90 PE has more than just the mufflers or (3) BMW has modified their PEs a bit over the years for whatever reason or (4) my current car has the BMW PPK stage 1 whereas the e92 didn't have any performance software. Both cars are 335i with n54 engines. Both cars have manual transmissions.

Would love to hear what you guys think. Thanks!
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      01-16-2014, 04:05 PM   #2
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i also think that those four reasons that you posted all seem correct as to why your not getting that same tone like you did with your E92.
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      01-16-2014, 04:09 PM   #3
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the burbling/backfire usually comes from excess fuel---cars might be tuned differently with different maps and performance settings---

When i added larger injectors and didn't tune my evo it was backfiring and shooting flames out of the exhaust until the tune.
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      01-16-2014, 04:26 PM   #4
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the e92 has a factory x-pipe with out a resonator .... while the e90 has a resonator instead of the X-pipe
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      01-16-2014, 04:32 PM   #5
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I am going to go with the fact that the exhaust is still new. Exhausts tend to "break in" after a couple hundred miles on them.

The fact that you now have an e90 and you use to have a e92 might not have anything to do with it. I believe the PE for e90 comes with not only mufflers but also the x-pipe. So the setup will be just like an e92. I might be wrong on this, but i believe i read this somewhere on here.
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      01-16-2014, 04:52 PM   #6
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Quote:
Originally Posted by 335is_ View Post
the e92 has a factory x-pipe with out a resonator .... while the e90 has a resonator instead of the X-pipe
You know a good local shop that will cut out the resonators and replace with an x-pipe? I wouldn't mind a little more exhaust noise if it's that cheap.

btw if this is who I think it is, I'm Gary's friend that just picked up your old car's twin... he's really trying to sell me on that diff. lol
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      01-16-2014, 05:29 PM   #7
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Thanks for the feedbacks

Yeah, at this point, I guess it is what it is. I still love the exhaust in every other way. At this point, I will put more miles on her and see if anything changes. Won't hold my breath, but we'll see.

If anyone has any other input/feedback, pls feel free to continue posting. Although the PE has been around for awhile now, I still feel like it always sparks interest in the e9x community.
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      01-16-2014, 05:33 PM   #8
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The PE is mufflers only. The E90 has a resonator right before the muffler section while the E92 has an x-pipe. Replace resonator with x-pipe and viola, you got the burbbles
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      01-16-2014, 06:17 PM   #9
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Quote:
Originally Posted by NudeLobster View Post
The PE is mufflers only. The E90 has a resonator right before the muffler section while the E92 has an x-pipe. Replace resonator with x-pipe and viola, you got the burbbles
I was under the impression that the PE for the e92 was mufflers only. But for the e90, I could've sworn that I saw the PE with mufflers and mid pipes / x pipes which replaced the stock e90 resonators?
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      01-16-2014, 07:37 PM   #10
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Mmmmmmmm, burbles.
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      01-16-2014, 07:44 PM   #11
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looking at an 08 e90 vs e92 on realoem, I don't see an x-pipe anywhere in the diagram

any ideas on a part number?
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      01-16-2014, 08:36 PM   #12
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This is the response I got from where I ordered the exhaust and had it installed (they did a great job with the install too. Very evenly aligned. No issues).

"I'm glad you like it man! It was a real pleasure to meet you the other day and glad we got the install done quick! I hope the rest of the process goes smoothly!! In regards to the exhaust note, I think its lost the burble because you have removed that valve piece and its open all the time now. That would be my guess. You should hear it though on cold starts.

The difference is what you thought, the e92 system is just the rear mufflers, It does not include the x-pipe/connecting pipes that the sedan one comes with. The E90 sedan kit gives you more of a full exhaust, not quite a cat back but it does eliminate the OEM resonator thats found on the stock exhaust. This would normally be retained on the coupes. Let me know if I can be of any further help and I look forward to seeing your car after its done!"
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      01-17-2014, 12:19 AM   #13
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Here's my E90 with PE... mine 'matured' and you can hear a nice burble and crackle toward the end of the video.

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      01-17-2014, 12:20 AM   #14
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Quote:
Originally Posted by 335is_ View Post
the e92 has a factory x-pipe with out a resonator .... while the e90 has a resonator instead of the X-pipe
The E90 PE comes with an x pipe in the midpipe that replaces the resonator. FYI.
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      01-17-2014, 12:22 AM   #15
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Quote:
Originally Posted by NudeLobster View Post
The PE is mufflers only. The E90 has a resonator right before the muffler section while the E92 has an x-pipe. Replace resonator with x-pipe and viola, you got the burbbles
Again... not true. The E90 PE comes with a mid pipe with an x pipe that replaces the resonator. I know because I bought one last year.

It's not mufflers only... it's mufflers and a mid pipe with x pipe built in.

FYI.
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      01-17-2014, 01:07 AM   #16
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Quote:
Originally Posted by stashtrey View Post
Again... not true. The E90 PE comes with a mid pipe with an x pipe that replaces the resonator. I know because I bought one last year.

It's not mufflers only... it's mufflers and a mid pipe with x pipe built in.

FYI.
I also have an e90 with PE installed and I can second this. The e90 version of PE comes with an Xpipe to replace the resonator.

I have also noticed that when running a stock tune my car is much louder and burbles much more (backfires sometimes too when shifting) than when running a procede. It's quite noticeable when switching between Map 0 and Map 1. That could be part of it as well.
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      01-17-2014, 01:10 AM   #17
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Quote:
Originally Posted by stashtrey View Post
Again... not true. The E90 PE comes with a mid pipe with an x pipe that replaces the resonator. I know because I bought one last year.

It's not mufflers only... it's mufflers and a mid pipe with x pipe built in.

FYI.
Thank you! U said what I wanted to say or was trying to say lol. I was hoping another member with an e90 335 n54 with PE would chime in. I should've taken a picture of the PE exhaust before the install. I just know it came in a very long box 😉

That may explain why the PE for the e90 335s costs a bit more.
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      01-17-2014, 01:15 AM   #18
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I have pics of my PE before and during install... just too lazy to resize for this site. So annoying to have to resize pics every time you want to post from your phone.
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      01-17-2014, 01:17 AM   #19
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Quote:
Originally Posted by rxbaker View Post
I also have an e90 with PE installed and I can second this. The e90 version of PE comes with an Xpipe to replace the resonator.

I have also noticed that when running a stock tune my car is much louder and burbles much more (backfires sometimes too when shifting) than when running a procede. It's quite noticeable when switching between Map 0 and Map 1. That could be part of it as well.
Thanks 4 the feedback. Can u elaborate a little on what exactly a "stock" tune implies? BMW ppk 1? Thank you.
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      01-17-2014, 03:17 AM   #20
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Quote:
Originally Posted by stashtrey View Post
Here's my E90 with PE... mine 'matured' and you can hear a nice burble and crackle toward the end of the video.

Very nice audio!! Captures the intoxicating throaty aggressive notes as well as the burbles and crackles when u let off of the throttle.
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      01-17-2014, 11:27 AM   #21
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i agree with the others it's because of the resonator in the e90. Now im not sure if the M sport comes with one but the reason why the coupe is just the muffler and the sedan includes the full piping with the H pipe is because the coupe already has the H pipe.

currently i have the stock exhaust with a X pipe installed, I do hear it burble... It wasn't as loud as i would like it to be. so the following month i ordered the PE and it has been sitting in my garage waiting for a decent day to install it.
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      01-17-2014, 01:14 PM   #22
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Quote:
Originally Posted by Nguyenhu0106 View Post
i agree with the others it's because of the resonator in the e90. Now im not sure if the M sport comes with one but the reason why the coupe is just the muffler and the sedan includes the full piping with the H pipe is because the coupe already has the H pipe.

currently i have the stock exhaust with a X pipe installed, I do hear it burble... It wasn't as loud as i would like it to be. so the following month i ordered the PE and it has been sitting in my garage waiting for a decent day to install it.
Can't believe you have the patience. Get that PE on your car already. You are going to love it!
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