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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Dual Exhaust Conversion: Teaser



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      09-13-2013, 06:35 PM   #1
Blindside_137
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After waiting 4 months for my diffuser and finally getting all the other parts together and painted, the car is just about finished with the biggest project I've ever been a part of.

Picked up the car today after three days at the body shop. They hacked off my muffler to make the dual diffuser work. The JGMODS rep bumper fit beautifully, the paint is perfect, and the diffuser lines up seamlessly.

So right now I'm running around with the muffler chopped off. Sound is awesome except for at 1.5k rpm under load, there is a really bad tinny sound like a quarter rattling loudly in the rear seats. Not sure if there actually is some loose change rattling around anywhere or not lol.

My plan is to get a magnaflow muffler and 2nd cat delete. That all is scheduled for Tuesday. Cyba 4 inch tips are all good to go.

Here are the pics of the car currently.
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      09-13-2013, 09:37 PM   #2
E90 328i Amir
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Looks really good! How does it sound at WOT compared to stock?
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      09-13-2013, 10:47 PM   #3
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Looks really good! How does it sound at WOT compared to stock?
I haven't driven or rev'd at WOT but overall the exhaust is nice and deep/throaty and burbles. I love it. Only weird spot is the 1.5-1.8k rpm range when under load. Something is ringing and sounds very tinny.
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      09-17-2013, 12:05 PM   #4
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Hey! Looks really nice,i have been trying to do this mod but the battery and the convertible unit is in my way.
Please could you send me pics of the underneath
THANKS
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      09-17-2013, 03:07 PM   #5
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Hey! Looks really nice,i have been trying to do this mod but the battery and the convertible unit is in my way.
Please could you send me pics of the underneath
THANKS
My car was rear ended and back at the body shop now. So I can't get pics for a while. They simply removed the shields that were in the way on the right side.
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      09-18-2013, 02:56 PM   #6
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Pics of the under side when you get a chance please! Lookin good tho!
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      09-18-2013, 03:04 PM   #7
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Pics of the under side when you get a chance please! Lookin good tho!
Thanks. It's gonna be a few weeks though since I was rear ended. But I'll be sure to get some
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      09-18-2013, 08:35 PM   #8
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Quote:
Originally Posted by Blindside_137 View Post
.. there is a really bad tinny sound like a quarter rattling loudly in the rear seats. Not sure if there actually is some loose change rattling around anywhere or not lol..
try stuffing a small towel/microfiber in rear compartment that slides or a tennis ball or 2.. I had a similar vibration and it worked. Looks good
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      09-18-2013, 08:37 PM   #9
Blindside_137
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Quote:
Originally Posted by JaysBlueE92
Quote:
Originally Posted by Blindside_137 View Post
.. there is a really bad tinny sound like a quarter rattling loudly in the rear seats. Not sure if there actually is some loose change rattling around anywhere or not lol..
try stuffing a small towel/microfiber in rear compartment that slides or a tennis ball or 2.. I had a similar vibration and it worked. Looks good
Nice! I absolutely love the muffler delete! So I'd like to not add a magnaflow muffler, the burbles when I let off the accelerator are intoxicating. And the volume/drone is surprisingly tolerable.
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      10-02-2013, 01:37 PM   #10
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hey! have you got your car back, waiting for you to post some pics on the exhaust mod
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      10-02-2013, 03:20 PM   #11
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Quote:
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hey! have you got your car back, waiting for you to post some pics on the exhaust mod
No my car has been back in the body shop for the last 3 weeks because I was rear ended. Still going to follow up whenever its ready. My plan is to keep the muffler delete and delete the 2nd cats
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