GTS exhaust = M3/M4 M Performance Exhaust?

[VCP]

Nope. The muffler has unique internal design for GTS. I have a M4 with full MPE and I swapped the Active mid pipe between the GTS and M4. They sound nothing alike. I am sure a big part of the sound difference is also from the GTS engine tuning differences as well.

Originally Posted by te37

My thoughts would be that a MPE with high-flow secondary cats (or possible strait pipes instead of the secondary cats) would sound the same as GTS exhaust.


p.s. I though I read somewhere that Akrapovic helped BMW create the MPE.

[VCP]

for your own info, see if a magnet sticks to the center section.

Originally Posted by Checkcaptain

And this one:

[Checkcaptain]

Originally Posted by VCP

for your own info, see if a magnet sticks to the center section.

It´s under the car already, but without testing it, I am pretty sure it´s just stainless - same as on E92 GTS.

[te37]

Man i was think GTS was full titanium

[Checkcaptain]

Here it is under the car. I double checked. Only rear section is TI like expected.

[VCP]

Then you can do this without guilt as you are not removing a "GTS" part per se.

Originally Posted by Checkcaptain

Here it is under the car. I double checked. Only rear section is TI like expected.

[Checkcaptain]

Nope, then I would be catless since I use Akra downpipes

[VCP]

I am running this on my GTS with factory downpipes. On my M4 I had this and Active Autowerke swain coated downpipes, no cats.

Originally Posted by Checkcaptain

Nope, then I would be catless since I use Akra downpipes

[CanAutM3]

Originally Posted by te37

p.s. I though I read somewhere that Akrapovic helped BMW create the MPE.

That was a rumor early on because the M5 MPE was made by Akra, but it was later confirmed to be un-founded. The M3/4 MPE was entirely developed internally at BMW.

[Checkcaptain]

Originally Posted by CanAutM3

That was a rumor early on because the M5 MPE was made by Akra, but it was later confirmed to be un-founded. The M3/4 MPE was entirely developed internally at BMW.

It's made by Prototechnik, which belongs to Eberspächer Group.

[CanAutM3]

Originally Posted by Checkcaptain

It's made by Prototechnik, which belongs to Eberspächer Group.

See page 13 of the attached brochure

[te37]

So who is going to cut open their GTS exhaust so we can compare it to the MPE?

[Rasya]

Don't know why but heard them back to back and the difference is very clear...

[te37]

Originally Posted by Rasya

Don't know why but heard them back to back and the difference is very clear...

Which doesn't make complete sense to me because once the valves open, which is when your most likely to hear the exhaust, they are both strait pipes with h-pipe in the middle.

[domino_z]

has anyone compared part numbers bw stock and gts downpipes?

i remember when i had my e46 m3, a few of us installed the csl cats, and it made the car raspier


edit! think i worked it out off real oem, downpipes are same, centre cats is different

zcp with m perf exhaust + gts centre cats (18307857330) = sorted i rekon

imo it's the centre cats that is giving the m4 that extra rasp, especially noticeable in this latest vid

[devotec]

Hi Guys,

My experience about exhaust silencer of M4 GTS
So You can swap it directely in place of the M-Perf silencer.
I like the sound
Look the link for pics

https://www.facebook.com/24829019189...type=3&theater

[Lojs]

Originally Posted by devotec

Hi Guys,

My experience about exhaust silencer of M4 GTS
So You can swap it directely in place of the M-Perf silencer.
I like the sound
Look the link for pics

https://www.facebook.com/24829019189...type=3&theater

How much is the rear section only?
Do you have any before/after videos?

[CanAutM3]

There is something that caught my eye in the Australian CarAdvice video, it is the colour of the exhaust mid section. It has the typical orange hue that titanium gets when it heated (before getting blue). Thought?

[te37]

https://youtu.be/b9Z8AjsBIBM

Did a little drive by the past weekend.

[stevehifi]

Guys any update on if we are able to purchase the GTS exhaust in the US? Part number?

[LOW4LYF]

Originally Posted by devotec

Hi Guys,

My experience about exhaust silencer of M4 GTS
So You can swap it directely in place of the M-Perf silencer.
I like the sound
Look the link for pics

https://www.facebook.com/24829019189...type=3&theater

Which one sounds better?

[stevehifi]

ttt