M3 exhaust modification

[Blade929]

I'm using a couple of different things. I got exhaust tape that is high heat that I'm going to use to further secure the exhaust bandage. I also got the stainless steel zipties that I'm going to use to secure the exhaust wrap with and the adheasive spray they suggest.

As you can see from the pictures the right hand side is kind of difficult to access the lower perferated pipe but not impossible. I marked in red the areas I dremmeled so that you can see the cuts more easily. On the right side I made the opening smaller the the left after seeing that i really didn't need to make the whole so large.

[mtl88]

Nice work! Is it off to the welder tonight? I'm looking forward to hearing your impressions.

[SOCAL]

Nice to see other people experimenting with modding the stock system. Its a great way to go. A local SDPD officer who was parked in the shopping center where I was getting gas this last weekend heard me pull in and came all the way over to see what it was and talk to me about my car. Suffice to say, he was impressed when I told him the exhaust was stock, just slightly modified!!!!

Keep on modding boys!!!!!! Looking Good!

[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.

[Periokid]

I wonder how many now have my exhaust.

[Grail05]

I will have a full write up on mine and pics sometime next week..

[JerezBlacke92]

I saw the video

, it sounds good. Any known HP or torque gains?

[Periokid]

Originally Posted by JerezBlacke92

I saw the video

, it sounds good. Any known HP or torque gains?

I don't know the answer but I don't perceive any changes on my car. Only sound changes.

[Blade929]

At powder coaters!

[Grail05]

Originally Posted by Blade929

At powder coaters!

damn its taking so longggg....

[Periokid]

Originally Posted by Sean05

damn its taking so longggg....

Hey you already know the results.

[Grail05]

Originally Posted by Periokid

Hey you already know the results.

It took me 2 hours well actually i had a exhaust shop did the mod for me i paid 200 to cut/replaced the pipe with an actual pipe instead of a wrap and sealed and sand thought id save myself the labor and pay an expert do the job... If u add everythng it comes up the same if u do it hourself lol

Ill post pics this weekend...

[Blade929]

Originally Posted by Sean05

It took me 2 hours well actually i had a exhaust shop did the mod for me i paid 200 to cut/replaced the pipe with an actual pipe instead of a wrap and sealed and sand thought id save myself the labor and pay an expert do the job... If u add everythng it comes up the same if u do it hourself lol

Ill post pics this weekend...

Yes but you don't get the satisfication of the cuts and abrasions from the DIY

[Grail05]

Originally Posted by Blade929

Yes but you don't get the satisfication of the cuts and abrasions from the DIY

After modding so many cars i gave up on certain things specially if i dont have the tools to do the mod...

Plus im right next to the guy takng picture so somewhat im involve with the mod lol

[chaos888]

Originally Posted by JerezBlacke92

I saw the video

, it sounds good. Any known HP or torque gains?

I went from stock exhaust to Meisterschaft GTS to modded exhaust. Going to the GTS (which I had on for a week) I didn't notice any changes in power. From the GTS to modded exhaust, the car pulls harder now.

No dyno results to prove it but I'm certain that it feels stronger.

[Grail05]

BTW if anyone wants to do this mod let me know (thats if your in SOCAL) ill post pics sometime tomorrow... The guy that did the mod for me did an excellent job so so good... and for the price cant beat it...

The guy is so anal that he wants everything perfect... also he mentioned that if you do the wrap in a long run (dont know how long) it might start to shred or clogged up the exhaust if you use the heat wrap so replacing it with the pipe is a must...

[Poppin Fresh]

I wish I had someone who could do this mod in the Northern NJ area with the price you guys mentioned. One shop asked for $500.00

[JCtx]

Originally Posted by JerezBlacke92

I saw the video

, it sounds good. Any known HP or torque gains?

Sounds like an unrefined V8 IMO. And too raspy. That was Periokid's car, right? He probably blocked all perforations.

Want to hear Sean05's car, with just welded pipes. It's going to sound pretty close, I guess. Wonder if somebody has done this about half way (blocking only half the welds). Also wonder how much the volume inside the cabin went up. Good day folks.

[Grail05]

Originally Posted by elp_jc

Sounds like an unrefined V8 IMO. And too raspy. That was Periokid's car, right? He probably blocked all perforations.

Want to hear Sean05's car, with just welded pipes. It's going to sound pretty close, I guess. Wonder if somebody has done this about half way (blocking only half the welds). Also wonder how much the volume inside the cabin went up. Good day folks.

i guess mine is almost the same sound but its really different sound in person than in video..

and in regards about rasp sound its not even close, i have no rasp on mine..

also the inside cabin i would say just a tad bit with no drone at all in any RPM...

and if you decide to cover half of the pipe might as well do the other small pipes and cover it but i think its going to be just a waste of time since its not going to make a difference..


it really does not sound as good in video than in person...

[chaos888]

Originally Posted by elp_jc

Sounds like an unrefined V8 IMO. And too raspy. That was Periokid's car, right? He probably blocked all perforations.

Want to hear Sean05's car, with just welded pipes. It's going to sound pretty close, I guess. Wonder if somebody has done this about half way (blocking only half the welds). Also wonder how much the volume inside the cabin went up. Good day folks.

I have welded pipes and I would say it sounds pretty much like Periokid's video (I have decent speakers hooked up to my computer). I would go so far as to say I'll bet our exhausts would sound the same in person. SOCAL's exhaust has welded pipes. He's posted a video of it.

Volume inside the cabin with windows closed hasn't gone up by much - enough that you can hear the exhaust and that it sounds sportier than stock.

Sounds sort of like the M3 GTS so I drive with the windows down whenever I can.

[SOCAL]

In regards to the "rasp"... there is none whatsoever, as stated above and in all my posts, the volume inside the cabin is slightly elevated, not intrusive at all, and drone is simply not there.

I replaced the larger of the two perf sections on each side of the exhaust, and it suites my needs perfectly. I also replaced all that nasty crimped pipe that actually runs from the midpipe to the "suitcase" muffler so I am wondering if that did anything to change the tone.

I completley finished my "customized" OEM system this last friday and it is 100% insane, details to come in a seperate thread.

[smmmurf]

I got mine done by Todd at Exhaust Works as per chaos888. Thanks for the tips everyone!

http://www.m3post.com/forums/showthread.php?t=391127