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      12-17-2012, 02:17 PM   #67
Lalit@AUTOcouture
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Quote:
Originally Posted by STi_traitor View Post
I didn't read the whole forum but wanted to ask a question. What in your opinion is the difference between doing this way and just replacing the perforated piping in the center of the can? It seems like this is better by reducing the amount of pipe and adding a easier flow for the exhaust. Agreed?
You get a much deeper and louder tone doing it this way vs. replacing the perforated piping.
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      12-17-2012, 02:27 PM   #68
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Quote:
Originally Posted by Lalit@AUTOcouture View Post
You get a much deeper and louder tone doing it this way vs. replacing the perforated piping.
Thanks!
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      12-17-2012, 02:34 PM   #69
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Quote:
Originally Posted by Lalit@AUTOcouture View Post
You get a much deeper and louder tone doing it this way vs. replacing the perforated piping.
Which method sounds closest to the OEM M performance exhaust?
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      12-17-2012, 06:17 PM   #70
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I did just the two long perforated pipes, and the car sounds really nice, you can hear a bit when cruising, and when you step on it, it sounds sweet.... Very loud!

Based on this, I wouldn't replace all pipes, just the two long baffles!

my 2 cents!
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      12-19-2012, 01:42 PM   #71
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Quote:
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I did just the two long perforated pipes, and the car sounds really nice, you can hear a bit when cruising, and when you step on it, it sounds sweet.... Very loud!

Based on this, I wouldn't replace all pipes, just the two long baffles!

my 2 cents!
I'll toss my pennies into that hat too.
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      01-06-2013, 11:59 AM   #72
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Doesn't this hurt (or increase) the car its performance because you are changing the exhaust's airflow design etc?
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      01-24-2013, 01:06 PM   #73
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Is it safe to say test-pipes + ACM exhaust mod for a daily driver might be a little much? I like loud cars, but a E90 M3 shouldn't sound like a nascar IMO. All the sound clips sound raspy, but it seems like the motor isn't warmed up. I want the performance of test pipes, with the sound of the ACM exhaust (only). Guess you can't have your cake and eat it too.
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      01-24-2013, 01:45 PM   #74
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Quote:
Originally Posted by 09GT View Post
Is it safe to say test-pipes + ACM exhaust mod for a daily driver might be a little much? I like loud cars, but a E90 M3 shouldn't sound like a nascar IMO. All the sound clips sound raspy, but it seems like the motor isn't warmed up. I want the performance of test pipes, with the sound of the ACM exhaust (only). Guess you can't have your cake and eat it too.
Exact setup I have been considering. Wondering if it will be too loud/raspy...
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      01-24-2013, 01:56 PM   #75
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I don't see where the rasp comes in if everything is stock and just doing the ACM mod. The rasp comes from removing resonators... The ACM mod is not raspy by itself compared to if you did the mod and resonator less. But people have differently tolerances to what is raspy and what isn't.
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      01-24-2013, 02:08 PM   #76
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Agreed.
I was referring to adding test pipes.
ACM by itself should sound perfect (no rasp).
I had a WS6 with cutouts a long time ago (similar to straight pipes) no rasp at all.

Quote:
Originally Posted by happos2 View Post
I don't see where the rasp comes in if everything is stock and just doing the ACM mod. The rasp comes from removing resonators... The ACM mod is not raspy by itself compared to if you did the mod and resonator less. But people have differently tolerances to what is raspy and what isn't.
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      01-24-2013, 03:01 PM   #77
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Quote:
Originally Posted by 09GT View Post
Agreed.
I was referring to adding test pipes.
ACM by itself should sound perfect (no rasp).
I had a WS6 with cutouts a long time ago (similar to straight pipes) no rasp at all.
Just like your post said. Reading failure, my bad!
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      01-24-2013, 03:10 PM   #78
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      01-24-2013, 03:29 PM   #79
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Can anyone tell me the size and thickness of the pipe used to replace the perforated pipes in the middle section? Thanks
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      01-24-2013, 03:39 PM   #80
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Quote:
Originally Posted by 09GT View Post
Agreed.
I was referring to adding test pipes.
ACM by itself should sound perfect (no rasp).
I had a WS6 with cutouts a long time ago (similar to straight pipes) no rasp at all.
Adding the test pipes to the ACM mod is what concerns me as well.
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      01-24-2013, 04:11 PM   #81
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I've replaced two perforated pipes with solid, removed centre cat/resonator with solid pipe.

It's mega loud and fairly raspy above 3000rpm. I mean VERY loud. But I think I like it. From way too quiet oem to maybe a bit too much? I don't know, I keep smiling.
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      01-25-2013, 07:56 AM   #82
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Nice sounding piece but I can't stand the plain look of the oem muffler.

Last edited by Chriskm3; 01-25-2013 at 08:52 AM.
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      01-25-2013, 02:54 PM   #83
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Quote:
Originally Posted by 09GT View Post
Is it safe to say test-pipes + ACM exhaust mod for a daily driver might be a little much? I like loud cars, but a E90 M3 shouldn't sound like a nascar IMO. All the sound clips sound raspy, but it seems like the motor isn't warmed up. I want the performance of test pipes, with the sound of the ACM exhaust (only). Guess you can't have your cake and eat it too.
From what I can tell, yes it will be loud and raspy. The OEM exhaust alone is already pretty loud (for my standards anyway). What is a big no no for is the rasp. I'm more looking for that deep tone.

So IMHO, Test pipes + OEM exhaust mod = no
Test pipes + other exhaust (I think I'm going to go with Megan exhaust) = yes.

But I'm happy with the way my exhaust sounds, so I'm in no rush to chop everything off and start over.
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      01-26-2013, 07:44 PM   #84
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Finally get to hear it myself instead of the drivers position. A bit too raspy. Add resonator back or h-pipe like akrapovic maybe??
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      01-27-2013, 08:10 PM   #85
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Interesting discussion, seems like there are many many variations.
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