128i BMW Performance Exhaust (difference between European Ref)

[hotwheels]

I would like to know the American Market reference for the 128i BMW Peformance Exhaust ?
In Europe, we have only 1 reference : 18 10 0444 747
For USA Market, there is an other reference : 18 10 0443 577 (right or wrong ?)

I notice someone says that there is not exhaust flap in BMW Performance Exhaust... Someone who had installed it on his 128i...

In Europe, PE comes with Exhaust Flap

Somebody could confirm ?

[andrey_gta]

Exhast flap makes it quieter at low revs, you can disable it.

128i PE has dummy connection, maybe 125i is dummy connection too?

[hotwheels]

No and it's my question...
PE for 125i => exhaust flap.
PE for 128i => No exhaust flap
Why ?

[andrey_gta]

No one will know, could be for marketing. 125i vs 135i in HP making the 125i appeal to more conservative customer ( especially with automatic)

[hotwheels]

Originally Posted by andrey_gta

No one will know, could be for marketing. 125i vs 135i in HP making the 125i appeal to more conservative customer ( especially with automatic)

Or noise restriction in Europe...
The OEM exhaust has got the flap, so PE must have the flap for homologation.

But Could you confirm that the American BMW Performance Exhaust hasn't got this flap for sure ?

[andrey_gta]

cannot confirm, I recall people mentioning it on 2 occasions

[wolfe]

I have the 128i performance exhaust (north american) and it does not have a flap. It has a small metal post on it where you plug the vacuum line to block it off.

[hotwheels]

Could you give me the BMW reference of your Performance Exhaust.
Is it : 18 10 0443 577 ?

[TheSt|G]

No, I'm pretty sure it is 18102208804.

[hotwheels]

It's a new BMW reference ?
Look here : http://www.realoem.com/bmw/showparts...18&fg=95&hl=10

[TheSt|G]

Yeah, when we buy it the exhaust comes without any additional piping. It's just the muffler.

[Light_Em_Up]

Originally Posted by hotwheels

Could you give me the BMW reference of your Performance Exhaust.
Is it : 18 10 0443 577 ?

18-10-0-443-577 is the BMW part no. for the performance exhaust I have on my 128 purchased from my local dealer. It has no flap, just a stud to plug the flap actuator vacuum hose left hanging from the stock silencer.

Jack

[JimD]

I'm not trying to be critical of people who like their "performance exhaust" from BMW but it doesn't seem to me that it's a good deal versus the Magnaflow which is a cat back. Larger pipe with smoother bends + a more open muffler seems like it would provide more benefit than just a more open muffler. I'd like a little more sound but I'd like a little less backpressure too and it seems like the BMW offering is really just more sound.

Jim

[hotwheels]

Originally Posted by JimD

I'm not trying to be critical of people who like their "performance exhaust" from BMW but it doesn't seem to me that it's a good deal versus the Magnaflow which is a cat back. Larger pipe with smoother bends + a more open muffler seems like it would provide more benefit than just a more open muffler. I'd like a little more sound but I'd like a little less backpressure too and it seems like the BMW offering is really just more sound.

Jim

I agree with you but it's not the question here
You can create a new thread

[TheSt|G]

I wouldn't worry about power gains from the muffler, you aren't going to get enough to worry. Just focus on what you like the best from a sound perspective.

[hotwheels]

Originally Posted by TheSt|G

Yeah, when we buy it the exhaust comes without any additional piping. It's just the muffler.

I would like to show you that there was 2 BMW references...
Why

The new PE comes now with a flap or it's just a reference change.

[flinchy]

Originally Posted by JimD

I'm not trying to be critical of people who like their "performance exhaust" from BMW but it doesn't seem to me that it's a good deal versus the Magnaflow which is a cat back. Larger pipe with smoother bends + a more open muffler seems like it would provide more benefit than just a more open muffler. I'd like a little more sound but I'd like a little less backpressure too and it seems like the BMW offering is really just more sound.

Jim

th emagnaflow is only a 2.5", stock is 2.5" with a crush.

aka magnaflow s a BIT better, because of the more open muffler etc. but mostly a waste of money.

ED: on the upside, it's cheaper than the BMWPE, and you're correct, it WOULD actually offer SOME performance when the BMWPE offers none

[CACTUS1549]

Originally Posted by JimD

I'm not trying to be critical of people who like their "performance exhaust" from BMW but it doesn't seem to me that it's a good deal versus the Magnaflow which is a cat back. Larger pipe with smoother bends + a more open muffler seems like it would provide more benefit than just a more open muffler. I'd like a little more sound but I'd like a little less backpressure too and it seems like the BMW offering is really just more sound.

Jim

You need a good backpressure for the 128 since it has a NA valvetronic motor. In 08 the N52 was made almost as a predecessor for the EfficientDynamics platform currently used based on the use of valvetronic bp.

Sources: work in Bimmer service dept., and speaking in detail on this subject with other techs.

[631twentyeighteye]

Well, i run a complete muffler/resonator delete and my car runs fine. The cats provide more than enough back pressure. My 128 performance exhaust did not have an exhaust flap.

[i128]

Originally Posted by CACTUS1549

You need a good backpressure for the 128 since it has a NA valvetronic motor. In 08 the N52 was made almost as a predecessor for the EfficientDynamics platform currently used based on the use of valvetronic bp.

Sources: work in Bimmer service dept., and speaking in detail on this subject with other techs.

THIS^

I always find it funny how aftermarket exhaust companies have brainwashed people into thinking that when you "gut" your muffler remove cats/any to all resonators, that you will get massive HP gains..
Dyno your car after a "shitty" exhaust mod, and you will most probably find that you loss torque...

OPs question: NO, the USDM BMWPE for 128i does NOT have a flap.

[CACTUS1549]

Originally Posted by 631twentyeighteye

Well, i run a complete muffler/resonator delete and my car runs fine. The cats provide more than enough back pressure. My 128 performance exhaust did not have an exhaust flap.

Not at all saying you will have "problems" with your motor, just saying what 'i128' is also, that those deletes have cost you low range torque. I bet your 1et sounds great though.

Originally Posted by i128

THIS^

I always find it funny how aftermarket exhaust companies have brainwashed people into thinking that when you "gut" your muffler remove cats/any to all resonators, that you will get massive HP gains..
Dyno your car after a "shitty" exhaust mod, and you will most probably find that you loss torque...

OPs question: NO, the USDM BMWPE for 128i does NOT have a flap.

+1

[TheSt|G]

Originally Posted by i128

THIS^

I always find it funny how aftermarket exhaust companies have brainwashed people into thinking that when you "gut" your muffler remove cats/any to all resonators, that you will get massive HP gains..
Dyno your car after a "shitty" exhaust mod, and you will most probably find that you loss torque...

OPs question: NO, the USDM BMWPE for 128i does NOT have a flap.

I wouldn't say it is the aftermarket exhaust companies that are pushing that agenda, usually people that are trying to budget mod.

This is why I always advocate a properly developed set of pipes though. BMW factory exhausts are very good, joe blow muffler shop isn't on the same level.