Downpipe Options For X5 F15 35i

[CeeTeeX5]

Originally Posted by Zorikos

Possibly. Although I don't think it's worth changing to a high flow catylitic.
A catless pipe will provide significant gains, but you need a flash tune to avoid a cel.

Good to know. I’ll prob wait till after my warranty expires before going the flash tune and dp route.

[Violator]

I run MPPK and Racechip Black GTS with MPE, if I swap my downpipe will I get a CEL?
Also, I don’t want to deal with a smell/odor so it sounds like catted dp for me.
Please advise.
r33_RGSport

[menelaos]

CEL is almost a given, but shouldn't be something worrisome, unless state does inspections. For example, NY State requires that all vehicles have no CELs and pass emissions after 2 year hiatus. Downpipe would most likely make it fail the emissions' test.

[CeeTeeX5]

Originally Posted by menelaos

CEL is almost a given, but shouldn't be something worrisome, unless state does inspections. For example, NY State requires that all vehicles have no CELs and pass emissions after 2 year hiatus. Downpipe would most likely make it fail the emissions' test.

Sure, but who tf wants to drive around with a CEL on all the time. No one.

[menelaos]

Originally Posted by CeeTeeX5

Sure, but who tf wants to drive around with a CEL on all the time. No one.

Indeed, I wouldn't either.
It's best if you accompany downpipe with a ECU flush, which in my case it'd mean I'd flush down the toilette $1200 for MPPK...and for you, your Dinan tuner money.

[r33_RGSport]

Originally Posted by Violator

I run MPPK and Racechip Black GTS with MPE, if I swap my downpipe will I get a CEL?
Also, I don't want to deal with a smell/odor so it sounds like catted dp for me.
Please advise.
r33_RGSport

Yes, CEL for sure.
I am testing a fix currently.
Then going to test Hi-Flow cat.
Give me a week, I should have something.

Been very busy.

[JCF15X5]

What I am trying to avoid is the cel or else catless was my first option.

[r33_RGSport]

Originally Posted by JCF15X5

What I am trying to avoid is the cel or else catless was my first option.

Just PM you.

[Sedoy]

[alik82]

Originally Posted by r33_RGSport

Just PM you.

so is there a fix for the downpipe and no CEL (unless you flash the ECU?)

[r33_RGSport]

Originally Posted by alik82

so is there a fix for the downpipe and no CEL (unless you flash the ECU?)

There are.
I only been testing with one.

[yewlock]

Originally Posted by r33_RGSport

There are.
I only been testing with one.

There are a fix? Or there are CEL?

[r33_RGSport]

Originally Posted by yewlock

There are a fix? Or there are CEL?

There is a fix.

[duercos]

Originally Posted by r33_RGSport

There is a fix.

Hi, is there a fix available yet?)

[r33_RGSport]

Originally Posted by duercos

Hi, is there a fix available yet?)

I have been testing it.
It was working fine for 3-4 months until dealer did software upgrade on my G30.
I just got a new batch 1-2 weeks ago. It clears automatically, but after filled up my tank, the CEL popped up again after a day.
So, I am trying to see what's going on here.
I have a few ready to ship, but I have to make sure that they are working products.
I just reset the CEL today, so give it a few days and see if it pop up again or not.

[duercos]

Originally Posted by r33_RGSport

I have been testing it.
It was working fine for 3-4 months until dealer did software upgrade on my G30.
I just got a new batch 1-2 weeks ago. It clears automatically, but after filled up my tank, the CEL popped up again after a day.
So, I am trying to see what's going on here.
I have a few ready to ship, but I have to make sure that they are working products.
I just reset the CEL today, so give it a few days and see if it pop up again or not.

Appreciate it Ben) this is for a catted one right? I would be glad to grab one, please let me know
PS one more question- how does it work with the bmw warranty policy? Mine is a lease. Thanks

[r33_RGSport]

Originally Posted by duercos

Appreciate it Ben) this is for a catted one right? I would be glad to grab one, please let me know
PS one more question- how does it work with the bmw warranty policy? Mine is a lease. Thanks

Oh, Hi-flow catted downpipe still throw CEL.
But, the module that I've been testing should work.

Warranty wise, you can't modify your car without the risk of losing the warranty.
But again, read Magnuson-Moss Waranty Act.
90% of BMW owners who are actively modding in this forum, are leasing theirs.

[JWK170]

Originally Posted by r33_RGSport

Oh, Hi-flow catted downpipe still throw CEL.
But, the module that I've been testing should work.

Warranty wise, you can't modify your car without the risk of losing the warranty.
But again, read Magnuson-Moss Waranty Act.
90% of BMW owners who are actively modding in this forum, are leasing theirs.

I may be in for one of your fixes. I am currently working on using the other fix we previously discussed - Mini Cat with elbow. It is not working. Getting codes for both slow reactions - from lean to rich and rich to lean. I am going to try taking off the mini cat and just use the 90 degree elbow and see if that is any better.

If not, I will give your wired version a shot. PM a price when you have a minute. Thanks.

[r33_RGSport]

Originally Posted by JWK170

I may be in for one of your fixes. I am currently working on using the other fix we previously discussed - Mini Cat with elbow. It is not working. Getting codes for both slow reactions - from lean to rich and rich to lean. I am going to try taking off the mini cat and just use the 90 degree elbow and see if that is any better.

If not, I will give your wired version a shot. PM a price when you have a minute. Thanks.

PM'ed

[gregkiel]

r33_RGSport it seems like n55 F15 DPs are slim pickings online. I am going from MHD stage 1 to stage 2 and it appears that a high flow or catless DP is required. Prefer catless. Also it is my understanding that flash tunes, such as the OTS MHD tunes change the parameters of the O2 sensors so that a catless or high flow don't throw CELs. Is that accurate or will a simulator be required to prevent a CEL throw.

[r33_RGSport]

Originally Posted by gregkiel

r33_RGSport it seems like n55 F15 DPs are slim pickings online. I am going from MHD stage 1 to stage 2 and it appears that a high flow or catless DP is required. Prefer catless. Also it is my understanding that flash tunes, such as the OTS MHD tunes change the parameters of the O2 sensors so that a catless or high flow don't throw CELs. Is that accurate or will a simulator be required to prevent a CEL throw.

If you are already using flash tunes, then you don't need other way to clear CEL.
Flash tunes will be able to ignore that CEL.

PM me if you are interested in the downpipe.

[Tiago@VRSF]

Originally Posted by gregkiel

r33_RGSport it seems like n55 F15 DPs are slim pickings online. I am going from MHD stage 1 to stage 2 and it appears that a high flow or catless DP is required. Prefer catless. Also it is my understanding that flash tunes, such as the OTS MHD tunes change the parameters of the O2 sensors so that a catless or high flow don't throw CELs. Is that accurate or will a simulator be required to prevent a CEL throw.

We've offered a F10 N55 catless downpipe for a few years now and we also have a downpipe fix that works with the same car.

We'll have a high flow catted downpipe available for this platform shortly that'll guarantee CEL free operation.