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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 > Modify OEM exhaust to sound like PE exhaust



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      11-06-2013, 05:41 PM   #595
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@lawwailok is at the exhaust shop right now so I'm uploading this for him. This is a PE taken apart, on the passenger side. I will update this post as necessary.

FYI: On the solid pipe side of the Performance exhaust, there is NO packing. Only the side where the perforated. And the packing looks a bit different from OEM.

All credits go to @lawwailok
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      11-06-2013, 05:46 PM   #596
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Thanks for posting up lawwailok! For reference here is a stock muffler cut open
http://www.e90post.com/forums/showthread.php?t=250659
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      11-06-2013, 05:48 PM   #597
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thank you @blisstik for uploading the picture. we are taking out all packing and covering up half of the perforated pipe and sealing up the passenger side muffler. probably same goes to driver side
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      11-06-2013, 05:50 PM   #598
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Curious to see what is in the driver side. On the passenger side it seems the only difference is one straight pipe
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      11-06-2013, 05:52 PM   #599
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Quote:
Originally Posted by blaster3500
Curious to see what is in the driver side. On the passenger side it seems the only difference is one straight pipe
Doesn't OEM have perforated + packing on the right side?
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      11-06-2013, 05:56 PM   #600
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Quote:
Originally Posted by blisstik View Post
Doesn't OEM have perforated + packing on the right side?
Yes sir, the stock has two perforated pipes, and packing on both sides of the passenger side muffler.

It will be interesting to see what is on the inside of the driver side muffler.

And once again, thanks for taking the initiative to get that PE opened up! We appreciate it.
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      11-06-2013, 06:02 PM   #601
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Quote:
Originally Posted by WhiteFury View Post
Actually. I am working to make sure that it wasnt co-incidence. I currently made another muffler and just finished installing it. I wanted to make sure it was 100% before I go spilling beans to which may be nothing more than a mess....

.....If you remove more than I have recommended you risk more drone, and the exhaust wont be much louder.

I will have pictures later.
Thanks for your contributions WhiteFury! It will be awesome to see those pictures. Thanks for taking the time and doing it a second time to make sure your process worked.
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      11-06-2013, 06:05 PM   #602
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OK guys, its somewhat maybe disappointing you guys here but I'm running out of time and talked to the muffler guy, we agree that let's drive around with the passenger side modded first and see what kind of sound impact it does by the mod. and we will go onto the driver side in the future.
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      11-06-2013, 06:10 PM   #603
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Oh no! I hope this is a joke. What can we do to convince you to cut that thing open?
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      11-06-2013, 06:14 PM   #604
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Quote:
Originally Posted by lawwailok View Post
OK guys, its somewhat maybe disappointing you guys here but I'm running out of time and talked to the muffler guy, we agree that let's drive around with the passenger side modded first and see what kind of sound impact it does by the mod. and we will go onto the driver side in the future.
Nooooooooo...please say you're kidding!!!

We're halfway there to knowing!
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      11-06-2013, 06:14 PM   #605
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Originally Posted by blaster3500
Oh no! I hope this is a joke. What can we do to convince you to cut that thing open?
hahahaha I have to run some errand for my store before the other place close their door in 40 mins. I wanna see what kind of sound impact by what we just did too.
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      11-06-2013, 06:15 PM   #606
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Quote:
Originally Posted by Jettin123
Quote:
Originally Posted by lawwailok View Post
OK guys, its somewhat maybe disappointing you guys here but I'm running out of time and talked to the muffler guy, we agree that let's drive around with the passenger side modded first and see what kind of sound impact it does by the mod. and we will go onto the driver side in the future.
Nooooooooo...please say you're kidding!!!

We're halfway there to knowing!
at least we now know the difference on the passenger side. if I'm not in need to run errand for my store I would love to open the other side up today too.
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      11-06-2013, 06:26 PM   #607
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Quote:
Originally Posted by lawwailok View Post
at least we now know the difference on the passenger side. if I'm not in need to run errand for my store I would love to open the other side up today too.
Actually just seeing the passenger side was still a HUGE help. With WhiteFury's findings, it makes perfect sense that there is only packing on the perforated H/Y pipe to absorb the drone.

So straight pipes in both mufflers with some packing tucked next to the perforated pipe to absorb drone sounds like it may be the winning combo.

I think this plus an X-Pipe and a secondary cat delete would probably sound fantastic.
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      11-06-2013, 06:32 PM   #608
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I had the PE. I'm willing to bet that the driver and passenger side is the same.

My thoughts:

Passenger side - Remove the outer perforated pipe, weld in a straight pipe and remove the packing (just like the PE). Remove 50% of the packing on the inner side and leave the perforated pipe alone

Driver side - Remove the mini resonator, weld in a straight pipe and remove the packing. Remove 50% of the packing on the inner side and leave the perforated pipe alone.

That should produce a close result to the PE. It should be just as loud as the PE, but I am thinking that it will sound slightly different since the PE uses different materials.
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      11-06-2013, 06:33 PM   #609
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Quote:
Originally Posted by lawwailok View Post
at least we now know the difference on the passenger side. if I'm not in need to run errand for my store I would love to open the other side up today too.
Hope you can find time tomorrow!

I'm just glad lawwailok was even willing to cut up his expensive PE exhaust for everyones benefit...he helped us greatly in finding out at LEAST half the equation...

So on that note, Happy Lawwailok Day everyone!! (although it was shortlived haha)
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      11-06-2013, 06:47 PM   #610
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Damn, this is exciting. Haven't seen so much progress in the entire life of this thread up until this point. Between lawwailok opening the PE and whitefury's findings. Thanks guys.

The thing is I noticed that most of you guys have an e90, will this be the same for the e92? I say this because I think I recall the e92 exhaust being a little different than the e90?
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      11-06-2013, 06:53 PM   #611
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I have done 2 mufflers this last 2 weeks. Its 100% that my findings were on point. BMW has tricked us.

Just leave the connector pipe alone, remove only 20% of packing to use with the 25% of packing from passenger side and use that on the driver side.

The packing doesnt affect the out of car sound. It only reduces unwanted cabin noise.

My method gives the benefits of the PE exhaust with NO cabin noise. Plus its alot less than $1300.
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      11-06-2013, 06:54 PM   #612
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Quote:
Originally Posted by StevenY. View Post
Damn, this is exciting. Haven't seen so much progress in the entire life of this thread up until this point. Between lawwailok opening the PE and whitefury's findings. Thanks guys.

The thing is I noticed that most of you guys have an e90, will this be the same for the e92? I say this because I think I recall the e92 exhaust being a little different than the e90?

Exact same. One of my mufflers modded is a E92 muffler.
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      11-06-2013, 07:26 PM   #613
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ok just got back to work and figured might as well wrap up what we did today before i have to work on the store stuff. we took out ALL packing from the section of the cross pipe, and covered top 1/2 of the perforated pipe and left the bottom half perforated.

what i can tell so far from a 20 mins driving;
1. it didn't change the original tone of the PE
2. it is definitely a bit louder but not crazy loud, i'll say 1-10 scale, PE is at 5 and just mod the passenger side is somewhat 6.5?
3. no drone
4. it pops more pronounce

i'll drive it a few more days and listen to it. hopefully can record some in-cabin video when im going home tonight as well as cold-start.
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      11-06-2013, 08:13 PM   #614
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lawwailok for orjme minister! Epic.
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      11-06-2013, 08:21 PM   #615
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Quote:
Originally Posted by lawwailok View Post
at least we now know the difference on the passenger side. if I'm not in need to run errand for my store I would love to open the other side up today too.
Yes, thank you!!!! I will be opening my muffler this weekend in hopes to get closer to the PE sound.

Appreciate your posting the pictures!!
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      11-06-2013, 09:25 PM   #616
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thanks for all the words guys. it's my pleasure to unveil some "secret" from bmw department. so it's no rocket science now... im sure all you guys running stock can magically turn it into a "PE" now (well at least passenger side, i'll try to find time to open the driver side soon to unveil the rest of it).

oh damn... now my PE isn't worth shit since everyone can have their own PE!!! hahahaha, i can't sell mine for shit now.... damn myself! jk

it always feel good to help out the community and try out something new
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