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DIY - 323i, 325i, 328i Performance Exhaust Installation
Published by Spinz
04-21-2013
DIY - 323i, 325i, 328i Performance Exhaust Installation

BMW Performance Exhaust DIY

Foreword:
1. I have taken the BMW installation instructions for the PE muffler that was posted to another thread and converted it to PDF, it is attached - I suggest downloading and using this for reference. Please scroll to the bottom of this post to access the attachment.
2. If you have access to a hoist, I strongly suggest you use it, it will make this DIY much easier.
3. Get a buddy to help, even if they just hold a light, help lift components into place and collect bolts it will make the install much smoother.
4. If you do not have access to a hoist, I suggest purchasing a large floor jack to assist with jacking the vehicle up high as the more height you have here, the easier it will be.
5. For proper jacking locations, reference this thread: http://www.e90post.com/forums/showthread.php?t=461718
6. You may or may not drop the entire exhaust from the headers back, I did not but this DIY assumes you will be removing the exhaust.
7. This DIY is performed on an 09 323i LCI but the procedure will be the same for the 325i & 328i as they use the exact same exhaust. This procedure will be similar to the 330i but will not apply to the 335i
8. This DIY utilizes jacks & jack stands, replace these steps with proper hoisting procedure if you are using a hoist.
9. Be sure to use proper safety procedures when jacking, lifting, cutting, etc. A good Bimmer Enthusiast is a live one.
10. There is a break in period for this exhaust, at first it will sound loud and somewhat 'ricey', but given time it mellows out and becomes deeper and raspier. Full break in time on my vehicle was about a month, however this will likely vary given ambient temperature and how often you drive.
11. I apologize for the dirty car, it's been pretty gross here lately, I have since washed her lol




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Step one: Suitably raise and support the vehicle. I find using ramps helps with lifting the front of the vehicle, use em if you've got em!




Step two: Prior to install, go out and purchase a "Exhaust Hanger Removal Tool" AKA "Exhaust Hanger Pliers". These can be purchased from Princess Auto, NAPA, Snap-On, and found online. You do not have to purchase these, but they cost about $10-$15 and will save you literally hours as well as prevent damaged parts. I did not buy one of these at first, spent 3 hours attempting to remove and damaged two hangers, one is shown below, trust me buy this tool. A DIY of how to use it is located here: http://www.youtube.com/watch?v=An1MPa2CwzY Note: If you are having trouble removing the hangers use WD-40 or a dish soap+water mix as lubricant to help with removing the hangers, just spray it in the hole in the hanger where the bracket connects




Step three: If you are dropping the entire exhaust, remove the bolts as shown below




Step four: Support the muffler with a rolling floor jack



Step five: Remove the three exhaust hangers





Step six: Cut the midpipes. Use a saws-all or cutting disk. If using a saws-all purchase titanium coated blades, they will make the job much easier. If you did not remove the original midpipe & secondary cats, you will not be able to use a cutting disk, you must use a saws-all - also take extreme care when cutting to not puncture the heat shield! If you did not drop the exhaust, remove the cut portion of the exhaust once your cuts are finished by sliding it toward the rear of the vehicle, it will just drop out.



Step seven: Remove the Acoustic Distributor and relocate to the PE Muffler



Step eight: Install the PE midpipe & clamps. Note: If you dropped the entire exhaust, re-install the original midpipe with the secondary cats and all other brackets/plates removed in step three prior to installing the PE midpipe.



Step nine: Install the PE muffler




Step ten: Torque the midpipe clamps



Step eleven: Torque the muffler clamp



Step 12: Ensure the exhaust tips are aligned properly and all clamps are secure, adjust as needed



Step 13: Lower the vehicle, put the tools away & start your bimmer!
__________________
2008 Sedonna Red 135i ///M Sport
LUX AE | Alarm Retrofit | Misc. Coding | Carbon Interior Trim
Year One of the 1


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  #1  
By DISPENZIEREN on 04-25-2013, 10:57 PM
ty man
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  #2  
By Spinz on 04-26-2013, 07:51 PM
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Quote:
Originally Posted by DISPENZIEREN
ty man
You're welcome! Let me know how it goes and if you have any suggestions to improve the DIY to make it easier for future users!
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  #3  
By dominators on 04-27-2013, 04:06 AM
Great DIY. I will definitely use this when I get my PE.
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  #4  
By YGazis109 on 04-28-2013, 10:59 PM
Does this work on xi too?
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  #5  
By Spinz on 04-28-2013, 11:09 PM
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Quote:
Originally Posted by dominators View Post
Great DIY. I will definitely use this when I get my PE.
Thanks for the feedback!

Quote:
Originally Posted by YGazis109 View Post
Does this work on xi too?
Yes, it should. Part no. for 328i & xi are identical according to Real OEM: 18102208793

As far as I know both i & xi are identical except for transmission and driveshaft(s)
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  #6  
By Derekmj on 04-30-2013, 06:06 PM
My PE is a little off center. Is there an easy fix for this? It's slightly too far to the left.
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  #7  
By Spinz on 05-23-2013, 01:04 AM
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Quote:
Originally Posted by Derekmj View Post
My PE is a little off center. Is there an easy fix for this? It's slightly too far to the left.
Sorry I missed your post, didn't receive an email for it.

Try loosening the clamp between the muffler and the midpipe and moving the muffler closer/farther away from the bumper. The position of the hangers should allow this in/out movement to shift the exhaust tips in/out and left/right. Ie, push muffler away from bumper, tips swing farther in and to the right, I'm guessing as to the left/right direction though, so trial and error to position it but that's how I fine tuned mine.
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  #8  
By bonzer2u on 06-10-2013, 08:55 PM
Thanks, plan on this being my first mod to an 08-E93.....
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  #9  
By apfelkatze on 07-30-2013, 06:32 PM
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Great job

Wow, great job, very clear photos. Did you notice any improvements with fuel economy?
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  #10  
By Spinz on 07-30-2013, 07:04 PM
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Quote:
Originally Posted by apfelkatze
Wow, great job, very clear photos. Did you notice any improvements with fuel economy?
Thanks man. Slight improvement but I also have the PI. Any long term improvement has been negated since I almost always drive in a lower gear to listen to the exhaust haha!
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  #11  
By Kirkies328 on 07-31-2013, 09:34 AM
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Bmw performance exhaust

What does the acoustic distributor do exactly. Nice diy btw
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  #12  
By Phil325i on 07-31-2013, 10:23 AM
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Quote:
Originally Posted by Kirkies328 View Post
What does the acoustic distributor do exactly.
Helps cut drone (I think).
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  #13  
By Kirkies328 on 07-31-2013, 01:41 PM
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Quote:
Originally Posted by Phil325i
Quote:
Originally Posted by Kirkies328 View Post
What does the acoustic distributor do exactly.
Helps cut drone (I think).
Does it make the exhaust any louder?
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  #14  
By Spinz on 07-31-2013, 01:43 PM
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I don't think so. It's basically a rubber cylinder so I think it must be drone related as was stated above
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  #15  
By Kirkies328 on 07-31-2013, 02:01 PM
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Quote:
Originally Posted by Spinz
I don't think so. It's basically a rubber cylinder so I think it must be drone related as was stated above
Ok thanks. Im gonna take it off an see if it makes a difference
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  #16  
By Kirkies328 on 07-31-2013, 03:25 PM
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I took the acoustic distributor off and there was no noise difference.
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  #17  
By Spinz on 07-31-2013, 08:14 PM
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Quote:
Originally Posted by Kirkies328
I took the acoustic distributor off and there was no noise difference.
Weird, well I guess we can just assume it's there for some reason
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  #18  
By KahNv2 on 08-01-2013, 03:37 PM
Realy good writeup!
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  #19  
By TomN614 on 08-16-2013, 08:44 PM
I just bought the PE for my 2010 328xi, I was told by someone I do not need to cut my stock pipe and that it just bolts on.. is this true? I've heard there are different versions of install depending on the car.
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  #20  
By Spinz on 08-18-2013, 02:10 PM
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Quote:
Originally Posted by TomN614 View Post
I just bought the PE for my 2010 328xi, I was told by someone I do not need to cut my stock pipe and that it just bolts on.. is this true? I've heard there are different versions of install depending on the car.
I would call up your local parts dept and ask them. Look at the pictures in this DIY as well. If you have a flange that matches up with the exhaust headers then I guess you won't need to cut but if it's just a pipe that ends you will probably need to cut. You can always take it to a muffler shop and have them do it as well.
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  #21  
By hotballs on 09-19-2013, 11:09 PM
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Did the clamps come with the PE exhaust or did they order those separatly?

How many clamps are there in total?

The parts department I called gave me one price for the PE exhaust and then said it was $25 for each clamp stating there were 2 clamps. Looks like there are more clamps from your writeup.

Great writeup, did you consider exhaust paste to insure sealing?
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