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BMW M5 F90 (2018+) General Forums Engine, Exhaust, Drivetrain, Tuning Modifications    Eisenmann down pipes and H&R springs installed

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      09-20-2018, 08:46 PM   #1
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Eisenmann down pipes and H&R springs installed

Finally got the Eisenmann Down Pipes installed and H&R springs

Big thanks to IND group to make this happen on short notice.

Like always phenomenal job done!!

I will post details about the exact drop and the
Spring rate, just so you guys have numbers as far as the difference in stiffness.

Mine job profession is tool and die making and I am also making springs for living.
I will check spring rates and record numbers to see what difference in % is from stock springs.

I will also make a video from outside and inside the car to hear the exhaust ( Already have Eisenmann Race exhaust with non resonated mid pipes.
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      09-20-2018, 08:52 PM   #2
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Cool. Go wake up the neighborhood! Its going to be loud! Cant wait to hear it.
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      09-20-2018, 09:27 PM   #3
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Just the secondary cats ?
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      09-20-2018, 09:30 PM   #4
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Quote:
Originally Posted by onfireX5 View Post
Just the secondary cats ?
Yes, so far I love it. Might do the primary too
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Originally Posted by M5speed View Post
Cool. Go wake up the neighborhood! Its going to be loud! Cant wait to hear it.
There is room in between neighbors, I don't think they will complain. Planning to remove cold start at some point, which will make a big difference.
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      09-20-2018, 09:35 PM   #5
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Most neighbors who know what the cars are already know they're beasts. Enjoy it. Who cares what they say. Let them love it or hate it all they want.
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      09-21-2018, 03:57 PM   #6
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Quote:
Originally Posted by Miko M View Post
Yes, so far I love it. Might do the primary too

There is room in between neighbors, I don't think they will complain. Planning to remove cold start at some point, which will make a big difference.
Miko,

Love it. On the F10 M5 I just gutted the OEM downpipes. Since you have them off do you think it is possible to gut the primary and secondary cats on the F90? I will probably go Eisenmann like you but worth asking to save some money and fit is on point then also.
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      09-21-2018, 04:19 PM   #7
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Glad to hear you like the downpipes

Eisenmann did a great job with them.



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      09-21-2018, 04:25 PM   #8
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Quote:
Originally Posted by apsuard View Post
Quote:
Originally Posted by Miko M View Post
Yes, so far I love it. Might do the primary too

There is room in between neighbors, I don't think they will complain. Planning to remove cold start at some point, which will make a big difference.
Miko,

Love it. On the F10 M5 I just gutted the OEM downpipes. Since you have them off do you think it is possible to gut the primary and secondary cats on the F90? I will probably go Eisenmann like you but worth asking to save some money and fit is on point then also.
Apsuard,

Just got it installed yesterday and didn't have time to look, the guy told me it took him long time to install because there is not much room.

I will make a video tomorrow and post, I have been spending time with family. But here is some pictures of a drop
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      09-21-2018, 05:30 PM   #9
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Do you feel that H&R's rear drop is not as advertised (1.2 inches)? I cant really gauge your rear drop from the pic you posted but me and EDDYFIG have both felt the H&R's didnt drop the rears enough.
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      09-21-2018, 05:55 PM   #10
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What are the upper downpipes?
On the IND Distribution website, Eisenmann has upper and lower downpipes?
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      09-21-2018, 05:56 PM   #11
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Quote:
Originally Posted by Vic55 View Post
Do you feel that H&R's rear drop is not as advertised (1.2 inches)? I cant really gauge your rear drop from the pic you posted but me and EDDYFIG have both felt the H&R's didnt drop the rears enough.
No, it's not
This picture below it's just reference from edge of rim , rear is about 3/8 front is about 3/4
I will confirm this number by measuring the springs it self at work and I will also check the spring rate. And will post the difference in % so you guys know if is stiffer or weaker.
I might make mine own springs and drop it lower
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      09-21-2018, 05:57 PM   #12
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Quote:
Originally Posted by apsuard View Post
Quote:
Originally Posted by Miko M View Post
Yes, so far I love it. Might do the primary too

There is room in between neighbors, I don't think they will complain. Planning to remove cold start at some point, which will make a big difference.
Miko,

Love it. On the F10 M5 I just gutted the OEM downpipes. Since you have them off do you think it is possible to gut the primary and secondary cats on the F90? I will probably go Eisenmann like you but worth asking to save some money and fit is on point then also.
Here are some pictures that you can see inside
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      09-21-2018, 06:05 PM   #13
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One thing I must say BMW EOM springs are done perfect from what I measured the F.L.
Considering open coils, variable pitch and the index of a spring, they did a great job.

I will stop by at IND and see if I can take a set of H&R springs to measure the F.L. and the rates
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      09-21-2018, 08:28 PM   #14
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Quote:
Originally Posted by M4LAKA View Post
What are the upper downpipes?
On the IND Distribution website, Eisenmann has upper and lower downpipes?
Upper are primary and lower are secondary. Removing secondary did not turn O2 CEL light. Primary in other hand will.
There is nothing on website as far as HP gains are :-(
Maybe IND has some more additional info that he can share. I would guess about 15
I noticed that the car is a little more responsive.

After intake and tune I will try to take it to dyno and see what numbers that will spit out
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      09-22-2018, 06:05 AM   #15
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Quote:
Originally Posted by Miko M View Post
Quote:
Originally Posted by M4LAKA View Post
What are the upper downpipes?
On the IND Distribution website, Eisenmann has upper and lower downpipes?
Upper are primary and lower are secondary. Removing secondary did not turn O2 CEL light. Primary in other hand will.
There is nothing on website as far as HP gains are :-(
Maybe IND has some more additional info that he can share. I would guess about 15
I noticed that the car is a little more responsive.

After intake and tune I will try to take it to dyno and see what numbers that will spit out
By any chance do you have pics of the stock secondary's?
Thank you sir.
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      09-22-2018, 07:09 AM   #16
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Quote:
Originally Posted by M4LAKA View Post
Quote:
Originally Posted by Miko M View Post
Quote:
Originally Posted by M4LAKA View Post
What are the upper downpipes?
On the IND Distribution website, Eisenmann has upper and lower downpipes?
Upper are primary and lower are secondary. Removing secondary did not turn O2 CEL light. Primary in other hand will.
There is nothing on website as far as HP gains are :-(
Maybe IND has some more additional info that he can share. I would guess about 15
I noticed that the car is a little more responsive.

After intake and tune I will try to take it to dyno and see what numbers that will spit out
By any chance do you have pics of the stock secondary's?
Thank you sir.
Sure, 1st picture is the look at inside
I didn't replace the primary one yet, those are much shorter in length
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      09-22-2018, 08:02 AM   #17
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Do upper down pipes have cats as well?
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      09-22-2018, 10:36 AM   #18
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Quote:
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Do upper down pipes have cats as well?
I believe so
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      09-22-2018, 11:05 AM   #19
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Quote:
Originally Posted by Miko M View Post
Quote:
Originally Posted by M4LAKA View Post
Do upper down pipes have cats as well?
I believe so
I wonder if any noticeable performance or audible gain replacing upper Downpipes as well.
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      09-22-2018, 11:44 AM   #20
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Quote:
Originally Posted by M4LAKA View Post
Quote:
Originally Posted by Miko M View Post
Quote:
Originally Posted by M4LAKA View Post
Do upper down pipes have cats as well?
I believe so
I wonder if any noticeable performance or audible gain replacing upper Downpipes as well.
I am sure, right now I notice difference in sound and feel it's more responsive, hard to tell if has more torque
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      12-29-2018, 12:01 PM   #21
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Quote:
Originally Posted by Miko M View Post
Quote:
Originally Posted by M4LAKA View Post
Quote:
Originally Posted by Miko M View Post
Quote:
Originally Posted by M4LAKA View Post
Do upper down pipes have cats as well?
I believe so
I wonder if any noticeable performance or audible gain replacing upper Downpipes as well.
I am sure, right now I notice difference in sound and feel it's more responsive, hard to tell if has more torque
Looking for aftermarket parts and looks like you have all the good stuff
I send you PM and mine E-Mail looking forward for response. Thank you so much for your time!
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      12-29-2018, 01:29 PM   #22
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Quote:
Originally Posted by M 4EVER View Post
Quote:
Originally Posted by Miko M View Post
Quote:
Originally Posted by M4LAKA View Post
Quote:
Originally Posted by Miko M View Post
Quote:
Originally Posted by M4LAKA View Post
Do upper down pipes have cats as well?
I believe so
I wonder if any noticeable performance or audible gain replacing upper Downpipes as well.
I am sure, right now I notice difference in sound and feel it's more responsive, hard to tell if has more torque
Looking for aftermarket parts and looks like you have all the good stuff
I send you PM and mine E-Mail looking forward for response. Thank you so much for your time!
Email send, that was a lot to write. Lol
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