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      11-09-2011, 09:25 PM   #1
Bubbles
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Stock Exhaust Mod (PICS)

I wanted to share some pics of the exhaust mod I had done on my car.

I had a few Ferrari drivers at the last track day tell me how great the car sounded, which I think confirms how great this motor sounds with a proper exhaust.

No regrets whatsoever!
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Last edited by Bubbles; 11-10-2011 at 12:36 AM.
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      11-09-2011, 09:31 PM   #2
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Sound impressions?
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      11-09-2011, 09:49 PM   #3
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Quote:
Originally Posted by Superfly_M3 View Post
Sound impressions?
Sounds like a high reving V8 should sound, especially on downshifts. I love it.

The sounds has actually helped a great deal with rev matching allowing me to put up personal best times.
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      11-09-2011, 10:58 PM   #4
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So all you do is take out the perforated section and weld in 2 straight pipes? That's it?
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      11-10-2011, 12:35 AM   #5
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Quote:
Originally Posted by mmm def View Post
So all you do is take out the perforated section and weld in 2 straight pipes? That's it?
We capped the small perforated pipes as well, replaced the stuffings. That's it.
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      11-10-2011, 01:21 AM   #6
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Why would you need to replace the stuffing if all the perforated pipe is replaced with solid pipe?

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      11-10-2011, 07:10 AM   #7
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so is this any different than just eliminating the rear muffler and putting straight pipes after the second set of cats? Is your sound now just being tuned by two sets of cats and resonators?
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      11-10-2011, 07:40 PM   #8
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Do you think there is a possibility of HP gains???
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      11-10-2011, 07:50 PM   #9
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Quote:
Originally Posted by CCL16M3 View Post
Do you think there is a possibility of HP gains???
There are zero power gains with this.

The packing would be unnecessary if all the perforated tubing was removed.
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      11-10-2011, 10:47 PM   #10
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Quote:
Originally Posted by CCL16M3 View Post
Do you think there is a possibility of HP gains???
No HP gain but I swear my throttle feels different.
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      11-11-2011, 07:58 AM   #11
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Quote:
Originally Posted by Dave07997S View Post
Why would you need to replace the stuffing if all the perforated pipe is replaced with solid pipe?

I didn't want any chance for rattles, so we dumped i back in before we resealed the chambers. Not sure if it reduces the volume, but I don't want the car any louder, it's at the sweet spot.

Dave
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Originally Posted by BMWJ View Post
so is this any different than just eliminating the rear muffler and putting straight pipes after the second set of cats? Is your sound now just being tuned by two sets of cats and resonators?
I didn't want any chance of drone so I keep the remaining chamber intact.

Quote:
Originally Posted by CCL16M3 View Post
Do you think there is a possibility of HP gains???
Unlikely, but no loss of torque. The motor feels a bit more free revving, similar to feel of the BMW performance exhaust. I did run personal best lap times this past weekend, the sound helps tremendously with rev matching a 6mt.

Quote:
Originally Posted by Jrollsp View Post
No HP gain but I swear my throttle feels different.

Agreed.
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