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      07-12-2017, 01:12 PM   #1
mashimarho
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BMW PE vs Stock with PE mod

Sounds like a silly question, but I've had the PE for years. Absolutely loved it.
Is the PE mod literally the same thing? I've never seen the internals of the PE itself. If they're literally the same, then wonderful! If not, what's different from doing the PE mod and the actually PE itself?
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      07-12-2017, 03:24 PM   #2
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Lol after talking to you earlier I'm now wondering the same thing. Also trying to figure out what (if anything) is different when doing the PE mod for an E92 N55 compared to the N54 PE mods I've seen.
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      07-12-2017, 03:28 PM   #3
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I've had both and I feel like my PE mod and DP setup was louder than OEM PE
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      07-12-2017, 03:47 PM   #4
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Quote:
Originally Posted by jgottsman11 View Post
I've had both and I feel like my PE mod and DP setup was louder than OEM PE
That is the answer I'm looking for!
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      07-12-2017, 03:55 PM   #5
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I've had both. The PE mod comes really close but the real PE exhaust sounds better.
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      07-12-2017, 03:57 PM   #6
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Quote:
Originally Posted by tkong View Post
I've had both. The PE mod comes really close but the real PE exhaust sounds better.
Really? In what way. The above just said the opposite.
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      07-12-2017, 04:00 PM   #7
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Quote:
Originally Posted by mashimarho View Post
Quote:
Originally Posted by tkong View Post
I've had both. The PE mod comes really close but the real PE exhaust sounds better.
Really? In what way. The above just said the opposite.
The PE mod muffler has a similar tone at idle but once you get into the rpms, it doesn't have the exact same tone as the real one.

Addressing the loudness of the PE mod, I think it depends on how it's done. Some people don't put back the insulation found or others split it into both mufflers, etc
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      07-12-2017, 04:05 PM   #8
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Quote:
Originally Posted by tkong View Post
The PE mod muffler has a similar tone at idle but once you get into the rpms, it doesn't have the exact same tone as the real one.

Addressing the loudness of the PE mod, I think it depends on how it's done. Some people don't put back the insulation found or others split it into both mufflers, etc
I have a couple comparison shots of one's I have seen with the rewelding itself.
This is the one I'd be getting..




Here are some other examples I have seen.




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      07-12-2017, 04:47 PM   #9
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I recall from photos that the inside pipe (the one that leads to the other muffler) has less perforation on the PE exhaust than stock. People doing the PE mod tend not not touch that. Maybe it makes a slight difference.

Also PE exhaust is constructed of lighter materials. This may affect sound too.

I've got the PE mod with stock downpipes and I love the sound. Considering downpipes for the performance aspect but I'm scared it'll get too loud...
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      07-12-2017, 05:24 PM   #10
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Quote:
Originally Posted by maddmatth View Post
I recall from photos that the inside pipe (the one that leads to the other muffler) has less perforation on the PE exhaust than stock. People doing the PE mod tend not not touch that. Maybe it makes a slight difference.

Also PE exhaust is constructed of lighter materials. This may affect sound too.

I've got the PE mod with stock downpipes and I love the sound. Considering downpipes for the performance aspect but I'm scared it'll get too loud...
Too loud is subjective but it would be too loud for me. If you daily drive it I would want something a little quieter. If it is your weekend/track car then who cares so long as you don't continue to get tickets.
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      07-12-2017, 05:35 PM   #11
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Wtf... this is not the "performance exhaust mod" that I've seen. All you did was straight pipe your exaust. 0 reason to have the mufflers at all now... it's just dead weight for you at that point.
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      07-12-2017, 05:50 PM   #12
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Quote:
Originally Posted by bbnks2 View Post
Wtf... this is not the "performance exhaust mod" that I've seen. All you did was straight pipe your exaust. 0 reason to have the mufflers at all now... it's just dead weight for you at that point.
+1

With the PE mod, one of the pipes in each side should still be perforated. That is a picture of a straight-piped muffler which would be MUCH louder. One difference between the PE mod and PE is that the PE mod retains the muffler flap. With the real PE, there is no flap so it is "on" 24/7. That is one complaint I've seen about the PE. If you don't like how loud it is with a catless DP, too bad.
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      07-12-2017, 06:00 PM   #13
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Quote:
Originally Posted by bbnks2 View Post
Wtf... this is not the "performance exhaust mod" that I've seen. All you did was straight pipe your exaust. 0 reason to have the mufflers at all now... it's just dead weight for you at that point.
Pictures of the PE mod you've seen?
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      07-12-2017, 06:00 PM   #14
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Quote:
Originally Posted by Johnny Boost View Post
+1

With the PE mod, one of the pipes in each side should still be perforated. That is a picture of a straight-piped muffler which would be MUCH louder. One difference between the PE mod and PE is that the PE mod retains the muffler flap. With the real PE, there is no flap so it is "on" 24/7. That is one complaint I've seen about the PE. If you don't like how loud it is with a catless DP, too bad.
How can one remove or close the flap from the muffler standpoint? Just plug it?
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      07-12-2017, 07:54 PM   #15
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Quote:
Originally Posted by mashimarho View Post
How can one remove or close the flap from the muffler standpoint? Just plug it?
I have it plugged. I have the pipes in both my mufflers as straight through pipes like the pictures you posted above. I only used the muffler packing from one muffler split between the two mufflers
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      07-13-2017, 12:26 AM   #16
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Quote:
Originally Posted by mashimarho View Post
Quote:
Originally Posted by Johnny Boost View Post
+1

With the PE mod, one of the pipes in each side should still be perforated. That is a picture of a straight-piped muffler which would be MUCH louder. One difference between the PE mod and PE is that the PE mod retains the muffler flap. With the real PE, there is no flap so it is "on" 24/7. That is one complaint I've seen about the PE. If you don't like how loud it is with a catless DP, too bad.
How can one remove or close the flap from the muffler standpoint? Just plug it?
Yes, you'd do it the same way as a stock muffler. If you want to control the flap, you can use the plug in the trunk, etc.
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      07-13-2017, 09:46 AM   #17
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I've heard an N55 with the PE mod and a DP and it sounds exactly like a full straight pipe with a DP. It's just loud! The PE and DP is a much much nicer sound.
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      07-13-2017, 11:22 AM   #18
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Quote:
Originally Posted by jczeffer View Post
I've heard an N55 with the PE mod and a DP and it sounds exactly like a full straight pipe with a DP. It's just loud! The PE and DP is a much much nicer sound.
As someone else has stated, it depends how it is done. If your muffler looks like picture #2, that is the correct way to do the PE mod and clearly is not straight-piped. Picture #3 is straight piped and should not be confused with the PE mod. There is a huge difference.
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      07-13-2017, 11:25 AM   #19
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Quote:
Originally Posted by Johnny Boost View Post
Quote:
Originally Posted by jczeffer View Post
I've heard an N55 with the PE mod and a DP and it sounds exactly like a full straight pipe with a DP. It's just loud! The PE and DP is a much much nicer sound.
As someone else has stated, it depends how it is done. If your muffler looks like picture #2, that is the correct way to do the PE mod and clearly is not straight-piped. Picture #3 is straight piped and should not be confused with the PE mod. There is a huge difference.
Of course. I apologize for not distinguishing!
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      07-13-2017, 12:27 PM   #20
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Mine is done the way Mash has it shown. It is indeed a concealed straight pipe but I don't find it as annoying nor have I had an issue with droning. I am coming from a HPF exhaust and a remus race. It is not as deep as the remus but close and it is not as obnoxious as the HPF.
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      07-13-2017, 12:50 PM   #21
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Quote:
Originally Posted by hz_diesel View Post
Mine is done the way Mash has it shown. It is indeed a concealed straight pipe but I don't find it as annoying nor have I had an issue with droning. I am coming from a HPF exhaust and a remus race. It is not as deep as the remus but close and it is not as obnoxious as the HPF.
Did the HPF drone at all?
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      07-13-2017, 01:11 PM   #22
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Quote:
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Did the HPF drone at all?
Hpf droned at at highway speeds. I has to install a race muffler in the middle to make it bareable and I am quiet use to drone.
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