[K2_e92]

So I'm thinking about getting a new muffler for my '09 328i coupe xdrive. Im looking at magnaflow mufflers and dont know exacly which one I should go with. Im thinking about the 14815, 14807, or 14816. Does anyone know which sounds the best? and would it make a difference to run a 2.5" magnaflow y-pipe? I also want to do a center resonator delete. Whats your opinion??
Thank you!

[Love The Drive]

Originally Posted by K2_e92

So I'm thinking about getting a new muffler for my '09 328i coupe xdrive. Im looking at magnaflow mufflers and dont know exacly which one I should go with. Im thinking about the 14815, 14807, or 14816. Does anyone know which sounds the best? and would it make a difference to run a 2.5" magnaflow y-pipe? I also want to do a center resonator delete. Whats your opinion??
Thank you!

From what Iv'e read around the forums, I believe the coupes already come stock without a resonator. As for the magnaflow mufflers, I have no idea. I had a friend put one on his sedan and he had to take it off within a week because he said it was too loud. Good luck with your decision!

[Socket]

Originally Posted by Love The Drive

From what Iv'e read around the forums, I believe the coupes already come stock without a resonator. As for the magnaflow mufflers, I have no idea. I had a friend put one on his sedan and he had to take it off within a week because he said it was too loud. Good luck with your decision!

Correct E92 have a x pipe, other E90s have a resonator
Magnoflow are nice but as quoted are loud
If you are looking for a BMW performance exhaust sound without the cost you could try this mod

http://www.e90post.com/forums/showthread.php?t=739970

[K2_e92]

Originally Posted by Socket

Correct E92 have a x pipe, other E90s have a resonator
Magnoflow are nice but as quoted are loud
If you are looking for a BMW performance exhaust sound without the cost you could try this mod

http://www.e90post.com/forums/showthread.php?t=739970

So do the coupes not have the y-pipe? Intend they have the x-pipe? I was looking under my car and couldnt find the resonator so that makes sense that there isnt one. But i couldnt tell what type of pipe is used

[jaceaholic]

Originally Posted by K2_e92

So do the coupes not have the y-pipe? Intend they have the x-pipe? I was looking under my car and couldnt find the resonator so that makes sense that there isnt one. But i couldnt tell what type of pipe is used

there is a resenator its right before the muffler

[Socket]

Originally Posted by K2_e92

So do the coupes not have the y-pipe? Intend they have the x-pipe? I was looking under my car and couldnt find the resonator so that makes sense that there isnt one. But i couldnt tell what type of pipe is used

Check this thread out.... may help

http://www.e90post.com/forums/showthread.php?t=782182

[hassmaschine]

all of those mufflers are only single 2.25" inlet. that's much too small. it will be louder, but I'd bet on stock flowing better.

[Ok]

Originally Posted by K2_e92

So I'm thinking about getting a new muffler for my '09 328i coupe xdrive. Im looking at magnaflow mufflers and dont know exacly which one I should go with. Im thinking about the 14815, 14807, or 14816. Does anyone know which sounds the best? and would it make a difference to run a 2.5" magnaflow y-pipe? I also want to do a center resonator delete. Whats your opinion??
Thank you!

14815 and 14816 are exactly the same, they just have different tips. If you are not interested in adding a full exhaust system and you don`t want something too loud they would be the perfect choice. I am 47 years old and I am not into loud exhaust systems, I just wanted a bit of sound so I went with the 14815 on my 06 330xi after I did a lot of searching on here and on youtube. The 14815 TIPS look very similar to the BMW PE and also to a lot of other name brand PE out there. The sound is beautiful to me and I get a lot of complements as to how nice it sounds and looks. Here`s a tread that shows exactly how the muffler was installed and how it looks. Hope this helps you make your decision, good luck.
(This is not my car, but mine was done exactly the same way.)
http://www.e90post.com/forums/showth...naflow+muffler

[K2_e92]

Thanks everyone! I did a little research and it says the difference between the 14815 and 14816 is that the 15 has 3" tips and the 16 has 3.5" tips...!

[K2_e92]

So im thinking 14816 with a resonator delete. What size pipe should i use?? (I think someone mentioned that the stock was 2.25". Would it sound better if a larger pipe is used?)

[K2_e92]

Also, where should the pipes be connected from 2 to 1? By the two cats? Or run two pipes all the way from the cats to the muffler and connect them there?

[hassmaschine]

Originally Posted by K2_e92

So im thinking 14816 with a resonator delete. What size pipe should i use?? (I think someone mentioned that the stock was 2.25". Would it sound better if a larger pipe is used?)

no. it's typically something like dual 1 7/8", which is equivalent to a single 2.5". it's hard to tell exactly without opening it up since BMW likes to use double wall tubing, which is quieter but also heavy.

either way, 2.25" single pipe is too small for a 3 liter motor.

[K2_e92]

Originally Posted by hassmaschine

no. it's typically something like dual 1 7/8", which is equivalent to a single 2.5". it's hard to tell exactly without opening it up since BMW likes to use double wall tubing, which is quieter but also heavy.

either way, 2.25" single pipe is too small for a 3 liter motor.

So should I do a single pipe of 3"? Or two pipes that are 3"? or is 3" too big?

[Taskmaster]

What are you looking for? For best performance, a single 3" pipe from the manifold to the muffler would offer the most gains. Otherwise, dual 2" pipes (x pipe if you would like) to a muffler is also an option.

[K2_e92]

Originally Posted by TheAxiom

What are you looking for? For best performance, a single 3" pipe from the manifold to the muffler would offer the most gains. Otherwise, dual 2" pipes (x pipe if you would like) to a muffler is also an option.

I believe the magnaflow 14816 that i ordered has a single 2.25" inlet, so would running two 2.25" pipes be the best for performance and sound and then form them into one to connect to the muffler??

[Taskmaster]

Originally Posted by K2_e92

I believe the magnaflow 14816 that i ordered has a single 2.25" inlet, so would running two 2.25" pipes be the best for performance and sound and then form them into one to connect to the muffler??

I personally wouldn't do that.

\\\== (exhaust manifold)

After the header you can A

====[___]= do dual pipes into single/dual mufflers
But this weights more and costs more. I'd also recommend a X pipe in there for proper savaging.

Or B

>------------[__]= Do a y pipe to a single pipe all the way back to a single muffler. Lighter and cheaper.

[bpray9223]

[K2_e92]

Originally Posted by TheAxiom

I personally wouldn't do that.

\\\== (exhaust manifold)

After the header you can A

====[___]= do dual pipes into single/dual mufflers
But this weights more and costs more. I'd also recommend a X pipe in there for proper savaging.

Or B

>------------[__]= Do a y pipe to a single pipe all the way back to a single muffler. Lighter and cheaper.

So do the Y-pipe and run a single pipe all the way back... what size piping? 2.25"? to match the sixe of the magnaflow muffler inlet?

[K2_e92]

Originally Posted by bpray9223

I have the 14816 to install which is a muffler and tips already put together...would it not sound good to delete the resonator and secondary cats with that type of muffler? I would be a longggg piece of piping straight from the primary cat to the muffler basically.

[bpray9223]

Originally Posted by K2_e92

I have the 14816 to install which is a muffler and tips already put together...would it not sound good to delete the resonator and secondary cats with that type of muffler? I would be a longggg piece of piping straight from the primary cat to the muffler basically.

I don't think it will be an issue. Just be aware that there is not much room to mount a muffler with tips pre-installed in the rear where the stock muffler currently sits. I went through the same issue when I had it fabricated at the exhaust shop. Due to the tight space and the rear differential in the way, I had the muffler mounted where the resonator used to be.

My muffler was dual inlet, single outlet. So I had the two pipes coming from the cats run into the muffler, then a single out to the rear with a y-collector and my exhaust tips mounted to that.

[Taskmaster]

Originally Posted by K2_e92

So do the Y-pipe and run a single pipe all the way back... what size piping? 2.25"? to match the sixe of the magnaflow muffler inlet?

3" would be best. That muffler is too small for our cars.

[Intotheblue]

Sorry to dig up this thread, new member and can't create a new topic yet.

I feel like the best solution for me to upgrade my exhaust and leave money for other mods is to go the Magnaflow muffler route, I've heard sound clips of the 12148 muffler and think its nice (especially considering the price).

The 12148 has the single 2.25" inlet, 2.5" core, and 2" dual outlet

Where the 14815 has the 2.25" inlet, dual 2" core, and 3" dual outlet.

Which of these 2 mufflers flow better for an E92 328i? I'm not really looking for or expecting power gains, just don't want any losses from stock. IF the most restrictive diameter of a stock system is already 2.25" on the exhaust somewhere, then neither of these will hurt performance will it? I don't know the diameters of the stock system, nor know exactly what the core diameters of the 2 Magnaflow mufflers really means but I imagine you guys do.

My other option is the IKON muffler, but I don't really want to consider it right now given the price and the other mods I rather do first. (Not a fan of how the AA muffler sounds). Whatever route I take I think I'll keep the resonator and delete the 2nd cat.