M3 exhaust modification

Poppin Fresh · 05-27-2010, 12:56 AM

Can anyone refer me to an exhaust shop in the Northern NJ area? I went to KC's Customs in Ramsey and they quoted me at $500. This mod would do for the meantime while I decide if I want to go the full Akra set-up or wait for the Rogue valve-tronic.

Blade929 · 05-27-2010, 07:33 AM

Mine's going on today. I'm going to try to use the decibal app on my phone and get some video of before and after.

Blade929 · 06-02-2010, 12:43 PM

Mine is on and I love it. I took some before videos but didn't get to take some afters yet. I also had it coated and wrapped the pipes with exhaust wrap.

1sikbmr · 06-02-2010, 12:49 PM

Quote:

Originally Posted by Blade929

Mine is on and I love it. I took some before videos but didn't get to take some afters yet. I also had it coated and wrapped the pipes with exhaust wrap.

Hey blade you know what I realized with the tape is when your really getting on the throttle the tape gets hot and starts to smell a little. Tell me if you notice it. It gets less noticeable after a while but it is still there...

Blade929 · 06-02-2010, 01:12 PM

Quote:

Originally Posted by 1sikbmr

Hey blade you know what I realized with the tape is when your really getting on the throttle the tape gets hot and starts to smell a little. Tell me if you notice it. It gets less noticeable after a while but it is still there...

I have I hoped it was just curing and would go away. Seems like I might eventually have to do what the other guys did and take off the exhaust and get it welded again.

1sikbmr · 06-02-2010, 01:40 PM

Quote:

Originally Posted by Blade929

I have I hoped it was just curing and would go away. Seems like I might eventually have to do what the other guys did and take off the exhaust and get it welded again.

I've had mine on the car for quite some time and I guess it is the curing. It does go away(mostly) until you really gas it. I'm hoping it goes away completely so people don't say my car stinks

but for the most part mine has become pretty tame and the exhaust has gotten slightly louder.

smmmurf · 06-02-2010, 09:04 PM

I got the pipes cut out and replaced with straight pipe. I think this is a better way to do it. The shops said that tape would only last a year at the most. I don't know if that's accurate or not, but I trust them since they've been in the business for a long time.

adc · 06-03-2010, 01:25 PM

Quote:

Originally Posted by Blade929

At welder should have it back by Monday then off to get it ceramically coated matte black to match my wheels. Hopefully on car by next weekend.

Would you mind doing the community a big favor and list all the materials (and quantities) used?

Also since I'm also in MD, where did you go for welding and jetcoating?

Finally, would you mind if we met somewhere so I can listen in person?

Much appreciated...

Blade929 · 06-03-2010, 01:40 PM

Quote:

Originally Posted by adc

Would you mind doing the community a big favor and list all the materials (and quantities) used?

Also since I'm also in MD, where did you go for welding and jetcoating?

Finally, would you mind if we met somewhere so I can listen in person?

Much appreciated...

I'd be happy to meet. It was welded by an employee of one of my buddy's companies however I have used Robert at Extreme Exhaust in Brooklyn MD before and if I need to open it up and get pipes welded in I'll go back to Robert. The coating was done in Eldersburg at Maryland Performance Coating. I know that jethot is a brand name and I'm not sure if this is the exact brand but it's basically that same type of material. I used heat shield products exhaust wrap http://www.heatshieldproducts.com/p_exhaust_wrap.php I got the 50 roll black which was perfect for the pipes from the exhaust to the clamp. I used pipe clamps i got from home depot as well as Heat shield's ties to secure the exhaust wrap and then sprayed it with the high temp coating/spray paint they say to use to make sure the wrap does nto fray and cures. I used the tape as mentioned earlier in the thread and some additional exhaust adheasive tape to secure the internals. Mine is completely covered (all perforations) and all sound deadening material removed.

adc · 06-03-2010, 02:25 PM

Quote:

Originally Posted by Blade929

I'd be happy to meet. It was welded by an employee of one of my buddy's companies however I have used Robert at Extreme Exhaust in Brooklyn MD before and if I need to open it up and get pipes welded in I'll go back to Robert. The coating was done in Eldersburg at Maryland Performance Coating. I know that jethot is a brand name and I'm not sure if this is the exact brand but it's basically that same type of material. I used heat shield products exhaust wrap http://www.heatshieldproducts.com/p_exhaust_wrap.php I got the 50 roll black which was perfect for the pipes from the exhaust to the clamp. I used pipe clamps i got from home depot as well as Heat shield's ties to secure the exhaust wrap and then sprayed it with the high temp coating/spray paint they say to use to make sure the wrap does nto fray and cures. I used the tape as mentioned earlier in the thread and some additional exhaust adheasive tape to secure the internals. Mine is completely covered (all perforations) and all sound deadening material removed.

Thanks, much appreciated!

I'll hit you up with a PM after I finish my DIY brake ducts so we can meet...

moody320d · 06-16-2010, 03:34 AM

Damn i wish i was local to you guys! great stuff everyone though, im defo gonna do this! But everyone seems to be con artists in london! the cheapest quote ive gotten is 500 POUND! if anyone has a good garage in london PM pleeease!

adc · 06-27-2010, 10:23 AM

I've been thinking about doing this mod and came up with a question: why cut the perforated pipes out and weld straight pipes in their place?

Wouldn't a series of exhaust pipe seal clamps do the trick instead? Something like this:
http://www.summitracing.com/search/D.../?autoview=SKU

What I have in mind is using several sealing SS clamps one after the other, to cover the perforated sections. This way, there is no need for the exhaust tape - which some think won't last a long time - and there's no need for cutting & welding inside the exhaust.

Is this idea crazy?

And speaking of which, what diameter are those perforated pipes?

WRCInterlagos · 06-30-2010, 01:22 PM

Quote:

Originally Posted by adc

I've been thinking about doing this mod and came up with a question: why cut the perforated pipes out and weld straight pipes in their place?

Wouldn't a series of exhaust pipe seal clamps do the trick instead? Something like this:
http://www.summitracing.com/search/D.../?autoview=SKU

What I have in mind is using several sealing SS clamps one after the other, to cover the perforated sections. This way, there is no need for the exhaust tape - which some think won't last a long time - and there's no need for cutting & welding inside the exhaust.

Is this idea crazy?

And speaking of which, what diameter are those perforated pipes?

I am wondering the same thing as far as the SS clamps. That sounds logical.

randy McMann · 07-01-2010, 02:40 PM

It's gonna be LOUD. If you're in N.Y., you best watch out for the poohleece? Know what I mean? I didn't know the stock system was built like that. I thought it was all chambers and baffling that caused the sound dampening, sort of like a flowmaster or something. Good to know. The guy at Remus USA said what makes a free flow work better than a stock is that sound absorption back pressure is better than mechanical back pressure. Said most are built w/ mechanical back pressure, to meet strict Euro standards. Cheaper to mfr. apparently.

adc · 07-01-2010, 04:03 PM

Quote:

Originally Posted by WRCInterlagos

I am wondering the same thing as far as the SS clamps. That sounds logical.

I've contacted a few members who had the mod done and they said the pipes are 2" diameter.

Anybody else know different?

kmarei · 07-05-2010, 10:55 PM

Quote:

Originally Posted by adc

I've contacted a few members who had the mod done and they said the pipes are 2" diameter.

Anybody else know different?

If you're gonna do this mod let me know
I'm trying to buy a used oem muffler now and want to do it as well
Maybe we can help each Other out

Also want to paint my tips and muffler black

Otacon132 · 07-06-2010, 08:03 AM

Quote:

Originally Posted by adc

I've contacted a few members who had the mod done and they said the pipes are 2" diameter.

Anybody else know different?

I'm having this done at one of (if not the best) muffler shops in Miami as we speak, pics and hopefully video to come later

And to clarify, the pipes are 2.5 inch, holding them as I type

Otacon132 · 07-06-2010, 08:10 AM

Pics of the pipe vs the stock connecting pipes

adc · 07-06-2010, 09:26 AM

Quote:

Originally Posted by kmarei

If you're gonna do this mod let me know
I'm trying to buy a used oem muffler now and want to do it as well
Maybe we can help each Other out

Also want to paint my tips and muffler black

Sure thing. I'm trying to get this done during the weekend of 17 if possible (the wife away weekend). I'm also involved in a tentative meet to get brake ducts installed for 2 other local members (doesn't have to be the same date though).

Either way, I'll let you know...

adc · 07-06-2010, 09:31 AM

Quote:

Originally Posted by Otacon132

I'm having this done at one of (if not the best) muffler shops in Miami as we speak, pics and hopefully video to come later

And to clarify, the pipes are 2.5 inch, holding them as I type

Thanks for the info! Do you have more pics of the new pipes welded inside?

Otacon132 · 07-06-2010, 09:48 AM

Quote:

Originally Posted by adc

Thanks for the info! Do you have more pics of the new pipes welded inside?

Finished welding just now I'll post once I get home and have a chce to work from the computer instead of phone

DirtyJersey · 07-06-2010, 10:32 PM

Anyone have a good idea of how long the perforated pipe part is? Guessing each side would be the same. Another member and I are thinking about getting the clams to use for this rather than the tape or welding new pipes. At 2.5 inches long we're trying to figure out how many clamps we'd need if this was the route we're going.

05-27-2010, 12:56 AM	#221
Poppin Fresh Colonel 109 Rep 2,147 Posts Drives: With a sunroof and front plate Join Date: May 2009 Location: Bergen County NJ iTrader: (0)	Can anyone refer me to an exhaust shop in the Northern NJ area? I went to KC's Customs in Ramsey and they quoted me at $500. This mod would do for the meantime while I decide if I want to go the full Akra set-up or wait for the Rogue valve-tronic. __________________
	Appreciate 0 Quote

05-27-2010, 07:33 AM	#222
Blade929 Lieutenant 46 Rep 446 Posts Drives: M2 CS Join Date: Nov 2006 Location: Maryland iTrader: (2)	Mine's going on today. I'm going to try to use the decibal app on my phone and get some video of before and after.
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06-02-2010, 12:43 PM	#223
Blade929 Lieutenant 46 Rep 446 Posts Drives: M2 CS Join Date: Nov 2006 Location: Maryland iTrader: (2)	Mine is on and I love it. I took some before videos but didn't get to take some afters yet. I also had it coated and wrapped the pipes with exhaust wrap.
	Appreciate 0 Quote

06-02-2010, 09:04 PM	#227
smmmurf Colonel 609 Rep 2,235 Posts Drives: E92 M3 DCT 383k+ miles Join Date: Feb 2008 Location: Stanford, CA iTrader: (8)	I got the pipes cut out and replaced with straight pipe. I think this is a better way to do it. The shops said that tape would only last a year at the most. I don't know if that's accurate or not, but I trust them since they've been in the business for a long time.
	Appreciate 0 Quote

06-16-2010, 03:34 AM	#231
moody320d Private First Class 7 Rep 195 Posts Drives: 09 M3 Coupe Silverstone II Join Date: Apr 2009 Location: London, United Kingdom iTrader: (0)	Damn i wish i was local to you guys! great stuff everyone though, im defo gonna do this! But everyone seems to be con artists in london! the cheapest quote ive gotten is 500 POUND! if anyone has a good garage in london PM pleeease!
	Appreciate 0 Quote

06-27-2010, 10:23 AM	#232
adc Major General 2844 Rep 6,812 Posts Drives: 2018 F80 M3 ED Join Date: Sep 2006 Location: MD/DC iTrader: (12)	I've been thinking about doing this mod and came up with a question: why cut the perforated pipes out and weld straight pipes in their place? Wouldn't a series of exhaust pipe seal clamps do the trick instead? Something like this: http://www.summitracing.com/search/D.../?autoview=SKU What I have in mind is using several sealing SS clamps one after the other, to cover the perforated sections. This way, there is no need for the exhaust tape - which some think won't last a long time - and there's no need for cutting & welding inside the exhaust. Is this idea crazy? And speaking of which, what diameter are those perforated pipes? __________________ 2018 991.2 Carrera T 2019 Z4 30i 2022 X2 M35i
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07-01-2010, 02:40 PM	#234
randy McMann Enlisted Member 0 Rep 36 Posts Drives: E36 M3 Join Date: Dec 2008 Location: L.A. CA. iTrader: (0)	It's gonna be LOUD. If you're in N.Y., you best watch out for the poohleece? Know what I mean? I didn't know the stock system was built like that. I thought it was all chambers and baffling that caused the sound dampening, sort of like a flowmaster or something. Good to know. The guy at Remus USA said what makes a free flow work better than a stock is that sound absorption back pressure is better than mechanical back pressure. Said most are built w/ mechanical back pressure, to meet strict Euro standards. Cheaper to mfr. apparently.
	Appreciate 0 Quote

07-06-2010, 08:10 AM	#238
Otacon132 Private First Class 21 Rep 109 Posts Drives: E90 M3 Sedan Join Date: Apr 2010 Location: Miami iTrader: (2)	Pics of the pipe vs the stock connecting pipes
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07-06-2010, 10:32 PM	#242
DirtyJersey Private 15 Rep 50 Posts Drives: M3 Join Date: Jun 2009 Location: North Jersey iTrader: (0)	Anyone have a good idea of how long the perforated pipe part is? Guessing each side would be the same. Another member and I are thinking about getting the clams to use for this rather than the tape or welding new pipes. At 2.5 inches long we're trying to figure out how many clamps we'd need if this was the route we're going.
	Appreciate 0 Quote