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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 > Secondary cat delete??????



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      11-19-2012, 12:58 PM   #23
amf133
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Car in the video sounds great.qny subventions to what exhaust you would use on a e92 328 with a m3 rear bumper. Want to do a m3 conversion and looking into what is the best exhaust to use for one.
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      11-20-2012, 12:09 AM   #24
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Quote:
Originally Posted by E90ROXS
I finally got it done today. 2nd cats are out! the car sounds incredible. When they cut out the mid pipe section (muffler was disconnected), I turned on the car and rev a few times just to witness how a muffler delete sound like. It sounded like a tank. If I had an american muscle car then I would do a muffler delete because it doesn't sound right on a bimmer. Back to the 2nd cats delete. The muffler gargle and pops more now. There is a tad bit of drone around 2K RPM but bearable. However I don't notice any drone when the car is in DS mode. As for loudness, maybe 5% louder. However the exhaust note changed. It has a warm throaty and gargle sound. Overall I'm very satisfied with this mod. Would I recommend this mod? Hell yeah! Here is my setup: afe magnum force intake, secondary cats delete, resonator delete, remus powersound (quad).
where did you get it done at??
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      12-06-2012, 12:54 PM   #25
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Here is my MD with a lil extra work , the tips I got for $40 and all custom work and out the door $120.

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      12-06-2012, 01:01 PM   #26
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Is this actually worth doing? W/o the resonator delete.

Been toying with the idea for awhile now.
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      12-06-2012, 01:06 PM   #27
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Quote:
Originally Posted by E90ROXS View Post
Thinking of removing the second cat on my car. The guy at the muffler shop told me he would do it but i might run into trouble with the smog shop. I know some of you are running without the 2nd cat. How did you pass smog check? By the is $250 a reasonable price to remove the cat?
just fyi,

I passed the smog with 2nd cat and resonator delete in January. The reading was excellent according to the technician.
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      05-07-2013, 01:04 PM   #28
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Quote:
Originally Posted by iczz View Post
just fyi,

I passed the smog with 2nd cat and resonator delete in January. The reading was excellent according to the technician.
oh my goodnes i've been looking for a post like this for days hahaha quick questions & stupid question, bay area smog test are the same as LA area right? planning on getting a PE & deleting the 2nd cat while they are down there.

also from reading this thread, I'm hearing a lot of low end torque is dropped if you delete the 2nd cats. would an AA tune fix this problem?
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      05-07-2013, 01:43 PM   #29
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Sound clip OP!
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