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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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      10-07-2012, 04:11 PM   #89
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They are welded on, and I got them from Cyba, a vendor on this forum.
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      10-07-2012, 04:29 PM   #90
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I wanna hear this monster...
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      10-07-2012, 04:43 PM   #91
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Quote:
Originally Posted by tomz_335i View Post
I have it on.....mechanic promised me pics later of what he did, but I got a look inside. It sounds siiick. Lots of burbling and crackling without the drone. Sounds very nice when you rev the engine and very similar to a PE exhaust.

He took out all of the insulation and perforated piping, and removed the H pipe, so its basically a straight pipe setup running through the mufflers. For some reason, the addition of the muffler through the pipes eliminates the drone. FWIW, I do have my main cats on, with the secondaries deleted.

Video up later!

Which shop did you go to?
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      10-07-2012, 10:18 PM   #92
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Quote:
Originally Posted by tomz_335i View Post
I have it on.....mechanic promised me pics later of what he did, but I got a look inside. It sounds siiick. Lots of burbling and crackling without the drone. Sounds very nice when you rev the engine and very similar to a PE exhaust.

He took out all of the insulation and perforated piping, and removed the H pipe, so its basically a straight pipe setup running through the mufflers. For some reason, the addition of the muffler through the pipes eliminates the drone. FWIW, I do have my main cats on, with the secondaries deleted.

Video up later!
Very nice man. I'm excited. Looking forward to the video. How close do you think it sounds to the PE?
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      10-07-2012, 11:25 PM   #93
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Can't wait to hear this!!! Idk why but my money is on the inners of the PE is no perforated holes at all... Everything else the same...
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      10-08-2012, 12:00 AM   #94
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Well Ive heard the PE a couple of times from outside. From inside my ride, sounds a little deeper. Sounded great when I got on the throttle. Rainy all day, so I will do a drive by, idle and revving video tomorrow.
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      10-08-2012, 12:08 AM   #95
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Quote:
Originally Posted by e92ben View Post
Can't wait to hear this!!! Idk why but my money is on the inners of the PE is no perforated holes at all... Everything else the same...
From my camera scope research that is correct. No perforated holes at all.
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      10-08-2012, 08:39 AM   #96
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Originally Posted by e92ben View Post
Can't wait to hear this!!! Idk why but my money is on the inners of the PE is no perforated holes at all... Everything else the same...
From my camera scope research that is correct. No perforated holes at all.
Did you see the difference in the left muffler? Did it have a resonator sort of thing that's shown in the pictures of the thread where in guy opened the oem muffler up
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      10-08-2012, 10:25 AM   #97
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Yeah, there was a resonator on the left side next to the flap.
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      10-08-2012, 01:04 PM   #98
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Man I want to hear this. I might carve mine open next weekend if it sounds good. What do you guys think about this and my CPO?
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      10-08-2012, 02:41 PM   #99
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Video!
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      10-08-2012, 02:43 PM   #100
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Video!
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      10-08-2012, 05:28 PM   #101
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Man I want to hear this. I might carve mine open next weekend if it sounds good. What do you guys think about this and my CPO?
They dont care at all about cat back exhaust so I dont see how this could be any different.
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      10-08-2012, 05:29 PM   #102
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Quote:
Originally Posted by tomz_335i
I have it on.....mechanic promised me pics later of what he did, but I got a look inside. It sounds siiick. Lots of burbling and crackling without the drone. Sounds very nice when you rev the engine and very similar to a PE exhaust.

He took out all of the insulation and perforated piping, and removed the H pipe, so its basically a straight pipe setup running through the mufflers. For some reason, the addition of the muffler through the pipes eliminates the drone. FWIW, I do have my main cats on, with the secondaries deleted.

Video up later!
Very nice! How much would this all cost? Do you think it'd still sound just as good without the secondary cat delete?
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      10-08-2012, 06:02 PM   #103
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No, it would lose some loudness.
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      10-08-2012, 06:36 PM   #104
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Waiting till they upload on Youtube before posting here. Honestly think I should slap my catless DP's back on for max loudness!
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      10-08-2012, 06:41 PM   #105
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https://www.youtube.com/watch?v=Q_1A...e_gdata_player















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      10-08-2012, 07:25 PM   #106
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record a coldstart tomorrow morning!
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      10-08-2012, 07:34 PM   #107
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Quote:
Originally Posted by tomz_335i
Pretty nice!! You have pictures of the process!?
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      10-08-2012, 07:35 PM   #108
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Quote:
Originally Posted by tomz_335i
Yeah, there was a resonator on the left side next to the flap.
I was asking if the PE has the resonator?! Do you have any pics and have you removed all the packing inside? Also how's the drone?
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      10-08-2012, 07:36 PM   #109
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Not yet. It was already done when I got there. But I took a look in. Straight pipes on both sides and no h pipe. Crackles and burbles like crazy when cruising!
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      10-08-2012, 07:37 PM   #110
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All packing removed. ZERO drone.
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