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      01-05-2017, 03:03 PM   #1
nthanos330i
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BMW 330i Magnaflow 14815

I had a magnaflow 14815 Street series muffler installed last week. I left the resonator intact to avoid drone, but I still get just a little under load --nothing turning up the radio doesn't fix . The muffler has not completely broken in yet, of course, but I am starting to notice some crackles on downshifts in "DS". For right now, I'm leaving the tips as they are, but will most likely have them cut and welded on to be more straight out the back.
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Last edited by nthanos330i; 01-05-2017 at 03:09 PM.
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      01-05-2017, 04:13 PM   #2
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absolutely in love with how the exhaust tips are angled like that.

I've been toying with the idea of adding a magnaflow muffler to my n52 equipped F10 for a while now.. looks like you have me sold.

Not sure if this still applies to newer BMW ecu's but its reccomended you dont do any full throttle pulls for the first 100 miles. after this, lots of real world driving will help your ECU adjust well so you can get maximum gains from your new muffler. most of the "break-in process" for new exhaust components is actually your ECU adjusting fuel/ignition timing to compensate for the modification in exhaust flow. this process took me roughly 400KM to complete when i had my secondaries deleted.

great to see you kept your resonator intact - not recommended you delete it as the drone will be atrocious around 2500-3000RPM and you actually LOSE torque unless you fit an x-pipe in the same place where the res used to be.

next step for you is a secondary cat delete!! the gains are quite nice and the sound along with your new muffler will be great. I already have mine deleted and am looking to install a magnaflow muffler very soon.

please film a fly-by video with this muffler!

cheers!
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      01-05-2017, 04:44 PM   #3
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Quote:
Originally Posted by 6IX-F10-N52 View Post
absolutely in love with how the exhaust tips are angled like that.

I've been toying with the idea of adding a magnaflow muffler to my n52 equipped F10 for a while now.. looks like you have me sold.

Not sure if this still applies to newer BMW ecu's but its reccomended you dont do any full throttle pulls for the first 100 miles. after this, lots of real world driving will help your ECU adjust well so you can get maximum gains from your new muffler. most of the "break-in process" for new exhaust components is actually your ECU adjusting fuel/ignition timing to compensate for the modification in exhaust flow. this process took me roughly 400KM to complete when i had my secondaries deleted.

great to see you kept your resonator intact - not recommended you delete it as the drone will be atrocious around 2500-3000RPM and you actually LOSE torque unless you fit an x-pipe in the same place where the res used to be.

next step for you is a secondary cat delete!! the gains are quite nice and the sound along with your new muffler will be great. I already have mine deleted and am looking to install a magnaflow muffler very soon.

please film a fly-by video with this muffler!

cheers!
I'll try to get that video! And sadly, being a CA resident where emissions standards are rather high, I don't see a cat delete in my future
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      01-06-2017, 01:20 PM   #4
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Quote:
Originally Posted by nthanos330i View Post
I'll try to get that video! And sadly, being a CA resident where emissions standards are rather high, I don't see a cat delete in my future
I meant secondary cats as you will pass the sniffer test with these removed, but then i remember you may not pass the visual inspection you have in cali.

perhaps if you personally know the shop owner when you go to get your emission test, they will pass you. whenever I have mechanics look underneath my car they dont even notice that the secondaries are gone because its just piping in place, you have to be specifically looking for it.

How does your car sound with the muffler? is there any drone at all? do you feel any power gains?
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      01-06-2017, 01:27 PM   #5
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Quote:
Originally Posted by nthanos330i View Post
I'll try to get that video! And sadly, being a CA resident where emissions standards are rather high, I don't see a cat delete in my future
also, what inlet size for the muffler did you pick, 2.25? how is it in terms of install? you just saw off the old muffler and weld the new one on right? nothing unexpected that my muffler guy will run into?

many thanks!
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      01-06-2017, 02:05 PM   #6
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Quote:
Originally Posted by 6IX-F10-N52 View Post
Quote:
Originally Posted by nthanos330i View Post
I'll try to get that video! And sadly, being a CA resident where emissions standards are rather high, I don't see a cat delete in my future
also, what inlet size for the muffler did you pick, 2.25? how is it in terms of install? you just saw off the old muffler and weld the new one on right? nothing unexpected that my muffler guy will run into?

many thanks!
I think the inlet was 2.5 on the new muffler. The stock piping may have been 2.75. The muffler guy didn't have any problems though.
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      01-06-2017, 02:07 PM   #7
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Quote:
Originally Posted by 6IX-F10-N52 View Post
Quote:
Originally Posted by nthanos330i View Post
I'll try to get that video! And sadly, being a CA resident where emissions standards are rather high, I don't see a cat delete in my future
I meant secondary cats as you will pass the sniffer test with these removed, but then i remember you may not pass the visual inspection you have in cali.

perhaps if you personally know the shop owner when you go to get your emission test, they will pass you. whenever I have mechanics look underneath my car they dont even notice that the secondaries are gone because its just piping in place, you have to be specifically looking for it.

How does your car sound with the muffler? is there any drone at all? do you feel any power gains?
There is a little drone under load if I'm being honest. Cruising on the freeway and around town though, there really isn't anything. You may want to add vibrant resonators or something in place of the factory one.
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      01-06-2017, 03:08 PM   #8
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Quote:
Originally Posted by nthanos330i View Post
There is a little drone under load if I'm being honest. Cruising on the freeway and around town though, there really isn't anything. You may want to add vibrant resonators or something in place of the factory one.
the 14815 muffler you have is a 2.25 inlet. I guess ill be going with the same one because those 3 inch tips look awesome. any performance gains worth noting?
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      01-06-2017, 03:15 PM   #9
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Quote:
Originally Posted by 6IX-F10-N52 View Post
Quote:
Originally Posted by nthanos330i View Post
There is a little drone under load if I'm being honest. Cruising on the freeway and around town though, there really isn't anything. You may want to add vibrant resonators or something in place of the factory one.
the 14815 muffler you have is a 2.25 inlet. I guess ill be going with the same one because those 3 inch tips look awesome. any performance gains worth noting?
I guess it is then haha. Um, not particularity, however I have a BMS Powerbox on my car, and would highly recommend that if your looking for a more sporty driving experience. It really livens up the engine.
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      01-06-2017, 06:59 PM   #10
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Sounds much better than stock
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      01-09-2017, 11:48 PM   #11
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Quote:
Originally Posted by nthanos330i View Post
I guess it is then haha. Um, not particularity, however I have a BMS Powerbox on my car, and would highly recommend that if your looking for a more sporty driving experience. It really livens up the engine.
fly-by video PLEASE!

the only other video of a magnaflow e90 fly-by was filmed 5+ years ago with a potato.
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      01-10-2017, 12:31 AM   #12
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Quote:
Originally Posted by 6IX-F10-N52 View Post
Quote:
Originally Posted by nthanos330i View Post
I guess it is then haha. Um, not particularity, however I have a BMS Powerbox on my car, and would highly recommend that if your looking for a more sporty driving experience. It really livens up the engine.
fly-by video PLEASE!

the only other video of a magnaflow e90 fly-by was filmed 5+ years ago with a potato.
I'll try my best but it won't be for a while. I park my car during the week while I'm at school. I'll try this coming weekend.
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      02-21-2017, 03:07 PM   #13
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Quote:
Originally Posted by nthanos330i View Post
I'll try my best but it won't be for a while. I park my car during the week while I'm at school. I'll try this coming weekend.
hey man, so I finally got the Muffler installed! heres what is sounds like with secondary cats deleted:





the blank video of me revving picked up the sound quality really nicely...

in the flyby video, it sounds WAY louder in person.

I have a different muffler from yours with custom tips welded on. I like your style exhaust tips better, and I think your muffler looks amazing angled out of the back like that.

Is the exhaust sound with and without secondary cats noticeable? what do you think? thanks!
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      02-21-2017, 03:08 PM   #14
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Quote:
Originally Posted by 6IX-F10-N52 View Post
Quote:
Originally Posted by nthanos330i View Post
I'll try my best but it won't be for a while. I park my car during the week while I'm at school. I'll try this coming weekend.
hey man, so I finally got the Muffler installed! heres what is sounds like with secondary cats deleted:





the blank video of me revving picked up the sound quality really nicely...

in the flyby video, it sounds WAY louder in person.

I have a different muffler from yours with custom tips welded on. I like your style exhaust tips better, and I think your muffler looks amazing angled out of the back like that.

Is the exhaust sound with and without secondary cats noticeable? what do you think? thanks!
Sounds good!
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      02-22-2017, 12:29 PM   #15
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in the flyby video, it sounds WAY louder in person.
<Blows right through a stop sign at 60kph>
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