[Jadar]

Originally Posted by anshu

Against this thread's advice i had a muffler delete done. It sounds nice at WOT but at idle when the car hasn't warmed up fully, it sounds awful. Like rattling the interior loud.

I'm wondering if instead of going back to the stock muffler and modifying it, I could just add a Helmholtz resonator to the piping in the rear to achieve a somewhat similar effect?

That's essentially what modifying the OEM muffler does right?

Yep I'd give that a try, it's essentially going to quiet it down but how much is the real question.

I can't stress enough how much I love my muffler mod and especially with a catted down pipe! It sounds exactly like an M2 with OEM muffler and downpipe in this vid:

[flipporabasta]

i need to do this 4 sure on mine
thanks everyone for sharing your thoughts and expereinces and especially to Dejan who was the ginnypig

[Jadar]

Originally Posted by flipporabasta

i need to do this 4 sure on mine
thanks everyone for sharing your thoughts and expereinces and especially to Dejan who was the ginnypig

I guarantee you'll love the sound with a down pipe. Here's what it sounds like...

[flipporabasta]

followup question. i have a regular steel welding machine, but i doubt it will work for this(fortunate as i am, i have a friend who has one that can handle stainless etc). what material is on the muffler and inside?

[Jadar]

Originally Posted by flipporabasta

followup question. i have a regular steel welding machine, but i doubt it will work for this(fortunate as i am, i have a friend who has one that can handle stainless etc). what material is on the muffler and inside?

The interior tubes are stainless steel, but the actual canister is aluminum I believe. I remember sticking a magnet and it fell right off.

[flipporabasta]

Originally Posted by Dejan_

The interior tubes are stainless steel, but the actual canister is aluminum I believe. I remember sticking a magnet and it fell right off.

so u used a welder for aluminium?

[Jadar]

Originally Posted by flipporabasta

so u used a welder for aluminium?

Whatever the exhaust shop used I'm not sure, I didn't stay to watch. You can weld aluminum for sure it just takes a lot of time and a lot of skill.

[flipporabasta]

Originally Posted by Dejan_

Whatever the exhaust shop used I'm not sure, I didn't stay to watch. You can weld aluminum for sure it just takes a lot of time and a lot of skill.

ill drop by the loaclexhaust shop here (about 5km) and check with them, exhaust mod vs customexhaust and check pricing. feels like it's better to leave to people who really have the welding skills

[Jadar]

Originally Posted by flipporabasta

ill drop by the loaclexhaust shop here (about 5km) and check with them, exhaust mod vs customexhaust and check pricing. feels like it's better to leave to people who really have the welding skills

IT will be very inexpensive to do a muffler delete and add some nice tips. Maybe $200. But you're going to get a good amount of drone from it. It does sound fantastic though if that's your type of thing.

[flipporabasta]

what im really after is a better flowing exhaust for my mods than stock. sound is secondary. i bet the catless DP will bring enough noise all by itself

[Jadar]

Originally Posted by flipporabasta

what im really after is a better flowing exhaust for my mods than stock. sound is secondary. i bet the catless DP will bring enough noise all by itself

Oh do re down pipe first and foremost it's the best bang for the buck and power.

[Tintin1174]

Hello,

First of all, thanks for all the good information!

I would like to make this change on my car.
I have two questions :

- Are there holes underneath too (see picture)? Should they also be closed?

- Should the holes in chamber 3 be closed?

Good night

Quentin

[Jadar]

Originally Posted by Tintin1174

Hello,

First of all, thanks for all the good information!

I would like to make this change on my car.
I have two questions :

- Are there holes underneath too (see picture)? Should they also be closed?

- Should the holes in chamber 3 be closed?

Good night

Quentin

Yes there are holes on the bottom as well. To achieve maximum sound weld all the holes shut. Some members have done it where they only weld the top holes they didn't want as loud of a sound.

[Dinan_Rated]

Anyone do this mod recently. Still debating on this mod, pie or delete? Already have resonator out. Thoughts

[Dinan_Rated]

No one recently modded exhaust on oem f30? Others still running this mod? Or moved onto PE?

[Jadar]

Originally Posted by Dinan_Rated

No one recently modded exhaust on oem f30? Others still running this mod? Or moved onto PE?

There only a handful of us with the mod . It's about 80% as loud as a muffler delete. Cut off the resonator and almost the same sound minus all the drone.

I ditched the MPE in favor of this hence the entire thread I started.

[BowzerF30]

Interesting, I happen to have a spare 335 muffler.. I'm considering this as well, or willing to sell my muffler to someone else that wants to take a shot at this mod.

The vids sound really good..

[Jadar]

Originally Posted by BowzerF30

Interesting, I happen to have a spare 335 muffler.. I'm considering this as well, or willing to sell my muffler to someone else that wants to take a shot at this mod.

The vids sound really good..

You should hear it with the down pipe

[Mr_White]

After reading this thread, I've decided to do the same on my M235i. Got it booked in for tomorrow. The car feels so boring to drive because it's so quiet (+numb steering), I'm praying this wakes up the little beast. Will post videos when it's done.

[Chicken_Joe]

My Modded MPE will be up for sale in the near future

[Aatish]

Originally Posted by Chicken_Joe

My Modded MPE will be up for sale in the near future

You finally modded one?

[Jadar]

Originally Posted by BMW..

If I want to do this, can I have any exhaust shop open it up for me and get it done relatively without issue? Or would I need to do this myself since it is a "special order" modification job rather than a fabrication one

Yes you can go to any shop. Just tell them to open it up and weld all the holes shut.