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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 > 325i muffler delete not loud enough. What's next?



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      12-20-2013, 12:10 AM   #1
NC325i
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325i muffler delete not loud enough. What's next?

Like the title says. I have a 06 325i e90 and have a muffler delete. It's nice just not quite loud enough. I absolutely love the tone and feel like it's amazing at lower rpm but above like 3-3.5k it just loses the noise! What's the next step to making it louder? Eventually I'd love to get a header with high flow cats and run straight back with nothing more to it, but I don't really have the $1300+ I see good headers going for.

Next logical step is a resonator delete correct? Or will this not really make much difference in terms of noise? I hear a secondary car delete is good too, but will that throw a code or CEL of some sort?

Thanks!
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      12-20-2013, 12:39 AM   #2
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chop off resonator
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      12-20-2013, 01:14 AM   #3
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This is hard for me to believe.. What are you used to driving or like the sound of that is louder? But yeah secondary cat or resonator delete would be next
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      12-20-2013, 06:12 AM   #4
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Only options left if you wanna stay on a budget is resonator and secondary cat delete other than that only way I know to make your car scream (racecar sound effect) at higher rpms is getting catless headers.
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      12-20-2013, 09:26 AM   #5
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Ok. Guess first of the year it's time to chop the res. off.

My car before this was a supercharged SVT focus but the reason I like the loud exhaust was an off road toy I had for a while and finally sold last year. An '86 ram charger with a 360ci V8. Had it dump straight out of the headers. Literally sounded like a nascar stockcar and I miss the brain numbing amounts of noise.

Thanks for the quick helpful responses guys!
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      12-20-2013, 10:18 AM   #6
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I wouldn't do that to a 325i. but I guess
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      12-20-2013, 11:58 AM   #7
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Quote:
Originally Posted by .fLip.
I wouldn't do that to a 325i. but I guess
If you say that then you haven't heard a 328 with catless headers and bmw performance exhaust in person yet.
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      12-20-2013, 12:40 PM   #8
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Quote:
Originally Posted by JS-NA.E92 View Post
If you say that then you haven't heard a 328 with catless headers and bmw performance exhaust in person yet.
Or catless headers y piped into a single pipe all the way to the tips. That is an orgasmic sound...
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      12-20-2013, 12:44 PM   #9
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This sounds pretty sick. But you will loose some torque removing the resonator. How much, I dont know.

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Last edited by Dylanize; 12-20-2013 at 12:50 PM.
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      05-10-2014, 12:19 AM   #10
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Quote:
Originally Posted by Dylanize View Post
This sounds pretty sick. But you will loose some torque removing the resonator. How much, I dont know.

true definition of a straight pipe.
I have my muffler and resonators remove with 3in pipe now and its loud AF idk how you have the secondary cats remove too. Beast
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      05-10-2014, 10:37 AM   #11
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What will happen when you remove the secondary cats and leave only the resonator in?
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      05-18-2014, 12:25 PM   #12
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Headerssssss
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