[BeachsideF30]

Originally Posted by Julesjohn

I had something slightly different done to my 2013 328i M Sport. I installed the Magnaflow 335i #15271 cat-back dual exhaust along with the 335i matte black diffuser. I like the deeper tone of the Magnaflow personally. This did require a few minor customizations from the local muffler shop and purchase of larger chrome tips. So far so good.

How was the full 15271 cat back able to fit for a 328? What was the process for installing. Any Videos?

[ajrettke]

Will an e90 n55 exhaust fit an f30?

[Julesjohn]

Originally Posted by BeachsideF30

How was the full 15271 cat back able to fit for a 328? What was the process for installing. Any Videos?

I edited my post to clarify how I have just the muffler of the 15271 system. Hope that clears it up.

[BeachsideF30]

Originally Posted by Julesjohn

I edited my post to clarify how I have just the muffler of the 15271 system. Hope that clears it up.

Got it thanks for the clarification.

[TBolts10]

Would you need a full 335 bumper to make this work on a 320?

[pkancel]

I did this about six months ago and have been extremely happy with the lower range sound and of course the cosmetics of having dual exhaust vs. twin on one side.

Here is the question for experts. I feel like I may have lost some of the lower end, off the line grunt as a result and my explanation is this but not sure if its just perception or could be reality. When I added the duals, just like in this post the pictures you see, there is one pipe running from the engine straight back and it used to bend around to the left into the muffler that had the twins on one side. With the new dual exhaust muffler, we had to tap into the other inlet pipe and by doing that, there was a direct straight line from the front of the car to the rear going out of that side. Even though the other side is connected, the right side now is more direct and so more exhaust comes out of that side than the other.

By doing this, did we reduce the back pressure, which in turn is causing a cleaner flow, hence the reduced lower end grunt, which feels like reduced HP/TRQ.

If the answer is yes, what would be the best way to build in some kind of restriction on that side-inlet pipe into the muffler to gain back the lower end again?

[TurboM]

Originally Posted by pkancel

I did this about six months ago and have been extremely happy with the lower range sound and of course the cosmetics of having dual exhaust vs. twin on one side.

Here is the question for experts. I feel like I may have lost some of the lower end, off the line grunt as a result and my explanation is this but not sure if its just perception or could be reality. When I added the duals, just like in this post the pictures you see, there is one pipe running from the engine straight back and it used to bend around to the left into the muffler that had the twins on one side. With the new dual exhaust muffler, we had to tap into the other inlet pipe and by doing that, there was a direct straight line from the front of the car to the rear going out of that side. Even though the other side is connected, the right side now is more direct and so more exhaust comes out of that side than the other.

By doing this, did we reduce the back pressure, which in turn is causing a cleaner flow, hence the reduced lower end grunt, which feels like reduced HP/TRQ.

If the answer is yes, what would be the best way to build in some kind of restriction on that side-inlet pipe into the muffler to gain back the lower end again?

I highly doubt that swapping out the oem 328 muffler for a 335 muffler had any impact on performance, especially down low in the rpm range, maybe a tiny bit up top ( >5k RPM). My thoughts are you are just hearing more exhaust noise at lower RPMs now and are subconsciously expecting the car to get up and go but it doesn't do anything different than it would in stock form, thus you interpreting this as power loss. Just my .02.

On a side note, my car is now bone stock (engine performance-wise) other than the muffler and I love the little bit of extra tone the muffler gives (I also modded the inside of the muffler for a bit more). More importantly though, I like to look a whole lot better.

[Vitoco]

I would go so far to say that I DEFINETELY feel it has gained up top, I both feel and see a noticable difference in how it pulls when goin flat out at speeds above 70 mph. Without a doubt it pulls a bit better. And that just makes sense since you have better exhaust evacuation now with the better flow in the MPE muffler.

And my flap is always OPEN on cold start, meaning fumes come out of both pipes and then after maybe 20 seconds or something it closes.

[BeachsideF30]

Originally Posted by Julesjohn

I had something slightly different done to my 2013 328i M Sport. I installed the Magnaflow 328i #15161 cat back dual exhaust system originally but later replaced just the muffler of the 335i #15271 system in order to split the exhaust and use the 335i matte black diffuser. I like the deeper tone of the Magnaflow personally. This did require a few minor customizations from the local muffler shop and purchase of larger chrome tips. So far so good.

Vimeo video link showing cold start exhaust sound with a few revs:

Sounds great, any videos of it driving under load? Maybe one flying up the side of the ravenel lol

[Sleepwalker]

Would this be possible to fit on a 320d? love the look of that muffler.

[Bedista]

Originally Posted by TurboM

Sent you a PM

can you please PM this information as well? The diffuser is dark shadow mettalic correct ? similar color to the m-sport oem 328i diffuser? Thanks.

[Bedista]

sounds great btw!

[exclusivo]

I let my friend do some fly-bys while I stood outside. Exhaust sounds incredible, groans, gurggles and burps... heard it two blocks away at full throttle.

[ilyabarankevich]

Here i found, milltek has a 335 exhaust on a 328i with pictures. I really like the look with the 2 tips sticking out

http://www.millteksport.com/exhaust....?variantid=418

[ajrettke]

Finally got around to the upgrade and pics.

Total cost was 375 for the exhaust and valence and 150 labor.

You can tell the exhaust sticks out a lot further than normal. I was originally upset, and they offered to fix it, but I said I'd think about it. It's actually growing on me. I actually think I'll stick with it, but not sure yet.

Otherwise, this completes the mods for the foreseeable future.

[BeachsideF30]

^sticks out way to far. Just get it fixed

[Vitoco]

Originally Posted by ajrettke

Finally got around to the....

Just remove the tips and push them in further then weld, I had a similar problem with my 335i MPE. Not as far out as yours but it was enough to look a bit off..

[MattTheCarNut]

Got my done today...



More here...

http://f30.bimmerpost.com/forums/sho...1039555&page=3

[G30 B58]

I have an OEM M-Sport diffuser for sale for the next person looking to go dual and save a couple of $$$.

http://f30.bimmerpost.com/forums/sho...7#post16892977

[jerefle]

Originally Posted by TurboM

Sent you a PM

Hey TurboM. Amazing! Great job! Looking to do the same, would you mind sharing the links where you purchased the exhaust and rear diffuser please?

Much appreciated!

[focal]

if going with a 335 exhaust makes you feel better on a 328…all the power to you. I still prefer the old school look of a dual on one side of the car.

personal preference. but feeling more "adequate" or inadequate has nothing to do with the rationale. People can call me poor all they want. Hell, my folks purposefully bought a 320 recently. Took a lot of flack for it, but who cares. Parents have a nicer second car, and homes worth way more. It's not about showing your wealth, but enjoying your wealth. Buy what you want, need and can use, not what others perceive you to be.

[TurboM]

Originally Posted by focal

if going with a 335 exhaust makes you feel better on a 328…all the power to you. I still prefer the old school look of a dual on one side of the car.

personal preference. but feeling more "adequate" or inadequate has nothing to do with the rationale. People can call me poor all they want. Hell, my folks purposefully bought a 320 recently. Took a lot of flack for it, but who cares. Parents have a nicer second car, and homes worth way more. It's not about showing your wealth, but enjoying your wealth. Buy what you want, need and can use, not what others perceive you to be.

I don't think the purpose of this is to make it look like you've spent an extra $7,000 on your car (maybe to some it is, but I can't speak to others intention). I personally like the look and enjoy the slightly increased tone of the 335 muffler. Most importantly, its much more economical than buying a $1k MPE muffler, with similar effects, other than the look and it's still an OEM part.

I'm sorry you feel people are trying to deceive you, and others by performing this modification, I don't think its the majority's intention. Glad to hear your parents are enjoying their 320 and nice home though.