[totomoto]

Hi all,

After some research I found that the downpipes for the newer F90 models are different. By newer, I assume this is the point of time when the OPFs were introduced, but I might be wrong.
However, there is a lot of misleading information about which ones are compatible with these models etc.
I managed to find only 2 places where they sell the setup on the left.
One of them was kind enough to upload the image below to illustrate the difference. Realoem is outdated (latest model is 12/2019), so it doesn't have the one on the left

Also in this video from Aulitzky shows how they are installing the left setup on the car

On the left is the newer setup with part numbers
18328088820
18328088821
18329504708
18329504709


On the right is the older setup (maybe still current for non-OPF cars) with part numbers
18327856827
18327856828
18327856829
18327856830

There are couple of obvious differences:
- The longer part is now the primary cat with sensors
- The mounting points are different
- There are no clamps between 1st and 2nd, also after 2nd, but bolts going along the pipes

Is this applicable only to EU spec cars?

Apologies if this was discussed in a different thread, but I couldn't find anything.

[mike@x-ph.com]

Im not aware of any change

[Holset]

Yes the downpipes and exhaust is different on EU spec cars after that point of time.
I wrote a bit on it the Awe exhaust thread.

There is actually six cats and two opf's stock and they also added two soot sensors it's crazy!

[Maverik259]

Originally Posted by Holset

Yes the downpipes and exhaust is different on EU spec cars after that point of time.
I wrote a bit on it the Awe exhaust thread.

There is actually six cats and two opf's stock and they also added two soot sensors it's crazy!

Lmao. What a joke.

[Info@mad-us.com]

Looks like the easiest way to know would be if you have a flange at the bottom of the downpipe to the exhaust.

[brokeboi]

OPF was introduced already in 2018 Comp models in the EU (sold as 2019 models), but kept the original cat design. It seems that the new cat design was introduced with the LCI.

[Holset]

Originally Posted by brokeboi

OPF was introduced already in 2018 Comp models in the EU (sold as 2019 models), but kept the original cat design. It seems that the new cat design was introduced with the LCI.

Yes but there may be some early cars that doesn’t have Opf’s if you look at the realoem site there are two exhaust one without and one with.

Also there are some early Lci cars that has the older downpipes and no extra cats.

[DavidXJ]

Originally Posted by Holset

Yes but there may be some early cars that doesn’t have Opf’s if you look at the realoem site there are two exhaust one without and one with.

Also there are some early Lci cars that has the older downpipes and no extra cats.

All Comps have OPFs as the filter came in from March '18 onwards (at least in the UK). There are, however, three successive part numbers that differentiate the M Sport exhaust for i) 2018-19, ii) 2020, then iii) the 2021-onwards LCI. So, BMW evidently adapted the exhaust incrementally to meet increasingly constraining emissions regs that ramped up between 2018 and the introduction the '21 LCI (with the notorious EU noise regs coming into effect, of course, in MY2020 and even more so for the LCI).

D

[Holset]

Originally Posted by DavidXJ

All Comps have OPFs as the filter came in from March '18 onwards (at least in the UK). There are, however, three successive part numbers that differentiate the M Sport exhaust for i) 2018-19, ii) 2020, then iii) the 2021-onwards LCI. So, BMW evidently adapted the exhaust incrementally to meet increasingly constraining emissions regs that ramped up between 2018 and the introduction the '21 LCI (with the notorious EU noise regs coming into effect, of course, in MY2020 and even more so for the LCI).

D

Yes so do you agree that there may be some early cars out on the road that does not have opf/gpf?

[DavidXJ]

Originally Posted by Holset

Yes so do you agree that there may be some early cars out on the road that does not have opf/gpf?

Yes, sorry--I misconstrued your point. Absolutely: early base models wouldn't necessarily have the OPF, though presumably they didn't also have the Comp-specific MSport exhaust system as standard. From the early promotional videos that BMW released, the EU base model also didn't seem to have overrun crackles/pops (though others would be able to vouch for that), for they were mapped in, at least initially, for the Comp's version of the S63 tune--only then to be mapped out again from July '19 (i.e. MY2020) onwards! So, my 2020 pre-LCI Comp, for instance, has more or less the same degree of bellow and growl as earlier Comps but no overrun crackles.

This fella here explains some of the distinctions with helpful clarity and aplomb. What I learned from him is that post-21 LCI Comps were even more constrained by added cats, in addition to the already-subdued noise reduction tune that they implemented for the mid-2020 release of the LCI.

[Holset]

Originally Posted by DavidXJ

Yes, sorry—I misconstrued your point. Absolutely: early base models wouldn't necessarily have the OPF, though presumably they didn't also have the Comp-specific MSport exhaust system as standard. From the early promotional videos that BMW released, the EU base model also didn't seem to have overrun crackles/pops (though others would be able to vouch for that), for they were mapped in, at least initially, for the Comp's version of the S63 tune—only then to be mapped out again from July '19 (i.e. MY2020) onwards! So, my 2020 pre-LCI Comp, for instance, has more or less the same degree of bellow and growl as earlier Comps but no overrun crackles.

This fella here explains some of the distinctions with helpful clarity and aplomb. What I learned from him is that post-21 LCI Comps were even more constrained by added cats, in addition to the already-subdued noise reduction tune that they implemented for the mid-2020 release of the LCI.

https://www.youtube.com/watch?v=53XszEDELOg

Okay👍my 21 Lci Comp crackled and poped stock if the exhaust button is activated not loud with the stock exhaust but when i straight piped it the pops and crackles got loud.

Also my car have 2 extra cats and 2 sot sensors from factory.