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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 08-23-2011, 09:31 PM
MrBMW525 MrBMW525 is offline
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Straight Pipe Help!

Hey guys. I'm gonna go take my car to the mechanic tomorrow to get my muffler taken out replacing it with a straight pipe dual tips on my E39 525i. My question is, is the resonator in the muffler inside? It might sounds like a really stupid question lol but I'm new to this stuff. Also Do the cats get removed? Where are the cats located? Would you guys prefer Muffler Delete or Resonator Delete?
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  #2  
Old 08-23-2011, 10:26 PM
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540indiana 540indiana is offline
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From what I have read. Keep your muffler. Lose the resonator.
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  #3  
Old 08-23-2011, 11:26 PM
MrBMW525 MrBMW525 is offline
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Quote:
Originally Posted by 540indiana View Post
From what I have read. Keep your muffler. Lose the resonator.
Alright, do you think the noise change is noticeable? Because I want it to sound loud with a deep tone.
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  #4  
Old 08-24-2011, 12:44 AM
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540indiana 540indiana is offline
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Mind you this is on a 540
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  #5  
Old 08-24-2011, 12:58 AM
MrBMW525 MrBMW525 is offline
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Quote:
Originally Posted by 540indiana View Post


Mind you this is on a 540


Damn it wish I had a 540 v8 those things haul ass and sound amazing...but I might do a resonator delete, and if I dnt like it I'll go with muffler delete. Or should I first do a muffler delete see if I like it, if I dnt I'll take my muffler back let them weld it back on and I'll try res delete...
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  #6  
Old 08-24-2011, 06:32 AM
JimLev JimLev is offline
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I'd remove the muffler first, it's a much easier and quicker job. It also is heavy, you will loose about 45 lbs of weight.
I don't have an I6 but did drive around for a few days when I chopped off my 540 muffler before I put an Eisenmann Race muffler on.
With no muffler is sounded pretty good. Give it a try and see what you think, post it if you can record it.
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  #7  
Old 08-24-2011, 06:56 AM
e39munoz e39munoz is offline
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Please keep us updated I've been thinking on doing this to my 530
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  #8  
Old 08-24-2011, 07:11 AM
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bmw_n00b13 bmw_n00b13 is offline
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You're in Cali... need the cats for CARB or something don't you?

Note that the inline six will drone heavily if you do not have a well planned system.
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  #9  
Old 08-24-2011, 08:53 AM
MrBMW525 MrBMW525 is offline
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I'll try and make anbeforenand after video. Today is the day I'm taking it to the muffler shop let's see what's gonna happen. I think I'm gonna muffler delete it first see if I like it, if not I'll tell them to reweld it on
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  #10  
Old 08-24-2011, 02:45 PM
MrBMW525 MrBMW525 is offline
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Alright guys, sorry couldnt get a before video. But I did a muffler Delete. And on the 525i it sounds amazing! Has that roar and definetely worth it!

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  #11  
Old 08-24-2011, 06:09 PM
JimLev JimLev is offline
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Wow, that sounds pretty darn good for a 6 cyl engine.
I think if you did just the resonator (and left the muffler on) it wouldn't have sounded that good.
The muffler has a way of killing those good sounds.
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  #12  
Old 08-24-2011, 06:45 PM
MrBMW525 MrBMW525 is offline
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Yeah actually I was expecting it to be a ****ty, raspy, high pitched loud sound. But its what i wanted. Deep, loud, noticeable, but not too loud for the cops and to disturb the neighbors unless I rev the hell out of it which i wont. Throttle Respose has definetly improved alot and I feel that I've gained some power but cant confirm that cuz i haven't dynoed it.
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  #13  
Old 08-24-2011, 06:50 PM
MrBMW525 MrBMW525 is offline
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Some Short revving
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  #14  
Old 08-24-2011, 08:26 PM
e39munoz e39munoz is offline
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How much did they charge you
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  #15  
Old 08-24-2011, 10:18 PM
MrBMW525 MrBMW525 is offline
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$100 with the tips. Tips are really nice, (theyre only for looks btw)
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  #16  
Old 08-25-2011, 12:51 AM
SlorpBop SlorpBop is offline
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Wow, sounds awesome! I also have an '01 525i and I think I will do this. One question, did you pick up the mufflers themselves after they were removed? Did they seem like they might be around 45lbs as JimLev was saying? If so I think I would like to do this mod for the weight shedding benefits as well as the added throttle response and sound. It's funny, just listening to you rev I can tell that the throttle is way more responsive. Thanks for the inspiration hahah!
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  #17  
Old 08-25-2011, 01:03 AM
MrBMW525 MrBMW525 is offline
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Quote:
Originally Posted by SlorpBop View Post
Wow, sounds awesome! I also have an '01 525i and I think I will do this. One question, did you pick up the mufflers themselves after they were removed? Did they seem like they might be around 45lbs as JimLev was saying? If so I think I would like to do this mod for the weight shedding benefits as well as the added throttle response and sound. It's funny, just listening to you rev I can tell that the throttle is way more responsive. Thanks for the inspiration hahah!
Yeah I picked up the mufflers and put them in my garage. Yes they weighed easy 40lbs. Throttle Response has improved after driving around the city, cutting people off just to test it out. Weight has shed of course 40lbs. It sounds amazing! Leave the Resonators on and just ask for a muffler removal in place for a straight pipe and exhaust tips and youre set. If you want, I can take a picture of where the muffler used to be and how it looks after.
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  #18  
Old 08-25-2011, 01:51 AM
SlorpBop SlorpBop is offline
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I would love a picture. I want to make sure it sounds as close to yours as possible, so if I can replicate your setup that would be awesome. Do you have any other tips or ideas?lol. I have been talking to a local guy here who can increase my displacement to either 3.0 or 3.2, although I still need alot more details out of him.
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  #19  
Old 08-25-2011, 01:55 AM
satxdancer satxdancer is offline
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Pics, pics, pics!!!!
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  #20  
Old 08-25-2011, 04:21 AM
mujjuman mujjuman is offline
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Lots of videos on yt showing how removing mufflers on the m54 equals justice.

Congrats.
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  #21  
Old 08-25-2011, 11:27 AM
MrBMW525 MrBMW525 is offline
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I'll post up a video explaining what he did, and show pics and picture of the muffler where exactly he cut it.
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  #22  
Old 08-25-2011, 01:24 PM
MrBMW525 MrBMW525 is offline
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  #23  
Old 08-25-2011, 07:20 PM
borahatch borahatch is offline
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I just did the same thing (except the tips) to my 540 and it sounds perfect. The shop only charged me $40. I was surprised the 6 cylinder exhaust note could sound that good. Nice work.
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  #24  
Old 09-08-2011, 12:37 PM
e39munoz e39munoz is offline
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So all you did is cut off the muffler put pipes and an exhaust tip?
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  #25  
Old 09-08-2011, 03:42 PM
MrBMW525 MrBMW525 is offline
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Quote:
Originally Posted by e39munoz View Post
So all you did is cut off the muffler put pipes and an exhaust tip?
Yea, and btw its a single pipe with a dual tip. Thats all. Resonators and cats are in place.
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