[k_mann]

So...theres a lot of options for catless downpipes. However I only seem to find sound clips of VRSF (which I do love the sound of.) Do they all sound the same?

I'm looking to add a catless downpipe for better cooling at the track (as well as VRSF or BMS race intercooler.) I see VRSF has a cerakote option which might be helpful. Only other beneficial downpipe I see is CTS as they have the bracket. Other than those things is it safe to say they're equal?

[VGSON]

I’s say equal yes..mad, cts, vrsf, etc..4” reduced to 3”…Sounds good and really not all that diff from cts sportcat except lil E smell….

If you have the means($$)…See about getting the midpipe fixed where the dp meets it..theres a reduction there to like 2.5”

[AmuroRay]

Originally Posted by VGSON

I’s say equal yes..mad, cts, vrsf, etc..4” reduced to 3”…Sounds good and really not all that diff from cts sportcat except lil E smell….

If you have the means($$)…See about getting the midpipe fixed where the dp meets it..theres a reduction there to like 2.5”

This is all true - I did a midpipe from AWE, the neck down on the stock pipe can be seen in my pictures on the MILVS thread.

Also, for downpipes - Info@mad-us.com looks very nice.


https://www.2addicts.com/forums/show...09492&page=246

[Info@mad-us.com]

Originally Posted by AmuroRay

This is all true - I did a midpipe from AWE, the neck down on the stock pipe can be seen in my pictures on the MILVS thread.

Also, for downpipes - Info@mad-us.com looks very nice.


https://www.2addicts.com/forums/show...09492&page=246

Very happy with how smooth our transition is compared to factory.

[VGSON]

Originally Posted by AmuroRay

This is all true - I did a midpipe from AWE, the neck down on the stock pipe can be seen in my pictures on the MILVS thread.

Also, for downpipes - Info@mad-us.com looks very nice.


https://www.2addicts.com/forums/show...09492&page=246

your factory downpipe looks different than my M2 n55. Surprised to see that. On ours the flex connection is down below after it connects to the midpipe. Just before the flex is where it shrinks down.

[Info@mad-us.com]

Originally Posted by VGSON

your factory downpipe looks different than my M2 n55. Surprised to see that. On ours the flex connection is down below after it connects to the midpipe. Just before the flex is where it shrinks down.

That's because he posted a b58 downpipe.


Here is our N55 Downpipe in catless and catted version.

[VGSON]

Originally Posted by Info@mad-us.com

That's because he posted a b58 downpipe.


Here is our N55 Downpipe in catless and catted version.

curious, have yall test fitted your f8x midpipe on an m2?

[AmuroRay]

Originally Posted by VGSON

curious, have yall test fitted your f8x midpipe on an m2?

I don’t think you can - it’s twin turbo, so it would need to be modified from dual inlets to single where the downpipe meets the midpipe.

I considered it when I was looking for a 3.5” off the shelf solution, but I just went with the AWE 3” in the end.

[Info@mad-us.com]

Originally Posted by VGSON

curious, have yall test fitted your f8x midpipe on an m2?

It will not fit.

[mike@x-ph.com]

+1 for MAD

[VGSON]

Originally Posted by Info@mad-us.com

It will not fit.

will you make a race midpipe for us? 4" dp to 3.5" midpipe with resonator options? Could be adapted to m240, m235, m2c's...

similar to this? https://www.2addicts.com/forums/show...hlight=exhaust

Or modified f8x kit?

[Info@mad-us.com]

Originally Posted by VGSON

will you make a race midpipe for us? 4" dp to 3.5" midpipe with resonator options? Could be adapted to m240, m235, m2c's...

similar to this? https://www.2addicts.com/forums/show...hlight=exhaust

Or modified f8x kit?

No plans at this time sorry.

[AmuroRay]

Originally Posted by VGSON

will you make a race midpipe for us? 4" dp to 3.5" midpipe with resonator options? Could be adapted to m240, m235, m2c's...

similar to this? https://www.2addicts.com/forums/show...hlight=exhaust

Or modified f8x kit?

Lol, I already asked this months ago as well.

A modular modpipe could fit basically any F2/3/8 with minimal changes - just added length for the F3x - and muffler combinations for those who want single, dual or anything else.

Motordyne did basically the same thing with their XYZ pipe, you would think other after market companies would try the same.

[VGSON]

Originally Posted by AmuroRay

Lol, I already asked this months ago as well.

A modular modpipe could fit basically any F2/3/8 with minimal changes - just added length for the F3x - and muffler combinations for those who want single, dual or anything else.

Motordyne did basically the same thing with their XYZ pipe, you would think other after market companies would try the same.

yeah, I hit them and active autowerks up too...asking the same thing

[6speed_M2]

I would get one with the bracket. I used one without it and it made some strange noises which I would assume was it rubbing somewhere and it did not sound as smooth as the one with brackets.

I’m not sure why exactly. The one without brackets had a raspier sound and the one with brackets had more spool. The Wagner downpipe has brackets and doesn’t cost much more than the alternatives.

[AmuroRay]

Originally Posted by VGSON

yeah, I hit them and active autowerks up too...asking the same thing

Let me know what you find, but I was told no - the interest wasn't there. These guys could probably do it - on the low:

https://www.trubendz.com/

[AmuroRay]

Originally Posted by VGSON

I’s say equal yes..mad, cts, vrsf, etc..4” reduced to 3”…Sounds good and really not all that diff from cts sportcat except lil E smell….

If you have the means($$)…See about getting the midpipe fixed where the dp meets it..theres a reduction there to like 2.5”

Just to follow up on this - you know that CG Precision used to make a 3.5 downpipe and a 3.5 Exhaust for F series cars, right?

I inquired about it a while back, and they were willing to do it if they a one off - they were not, they wanted a minimum buy in. But I figure you have the support here on the M2 forum and maybe a few other guys to at least get their downpipe.

https://f30.bimmerpost.com/forums/sh....php?t=1559266





And of course the sound of the full 3.5"

https://f30.bimmerpost.com/forums/sh....php?t=1040514

[///MPhatic]

Not sure how anyone could like the sound of catless over catted, but to each their own. You're not going to get any different sound from any of the cattless versions, they're all going to be bright, raspy and nasty. lol

[AmuroRay]

Originally Posted by ///MPhatic

Not sure how anyone could like the sound of catless over catted, but to each their own. You're not going to get any different sound from any of the cattless versions, they're all going to be bright, raspy and nasty. lol

That video is the stock downpipe

[///MPhatic]

Originally Posted by AmuroRay

That video is the stock downpipe

I didn't watch any video, it was a general statement, and holds true.

[k_mann]

Originally Posted by ///MPhatic

Not sure how anyone could like the sound of catless over catted, but to each their own. You're not going to get any different sound from any of the cattless versions, they're all going to be bright, raspy and nasty. lol

Don’t really care how it sounds, but I’ve listened to enough clips to disagree, catless sounds better. Plus this is mainly for keeping engine bay cool at track and would be waste to just destroy a nice cat like Wagner or fabspeed comes with

[VGSON]

Originally Posted by AmuroRay

Just to follow up on this - you know that CG Precision used to make a 3.5 downpipe and a 3.5 Exhaust for F series cars, right?

I inquired about it a while back, and they were willing to do it if they a one off - they were not, they wanted a minimum buy in. But I figure you have the support here on the M2 forum and maybe a few other guys to at least get their downpipe.

I doubt they'll make it and I dont care to ask/beg another company to make one..(MAD/VRSF/AA) The midpipe near the flex is where the real restriction comes into place. I'm having the system made by a local welder out of stainless. .Its like $200 for a catless downpipe. Shouldn't be too much more to have the end cut and opened up(the midpipe and exit will be $$ though).

and yes, an open downpipe sounds good/fine and not much different than a 200 cell version. adding a few resonators into the system will be good too.