[dinan5m3]

Originally Posted by Chief Orman

At the risk of being obtuse is the concern concussing the cat with burbles?

The burbles would be least of it.

I guess what i'm trying to say here is, i was drinking out of that DP Kool-Aid, had i known what i know now i would have just gotten a "catless" DP.

The "catted" DP with OTS tunes really has no value, IMHO.

And going "custom" tune on OTS platform even adds less value, IMHO.

But it's your car, go for it, as people say.

[Info@mad-us.com]

If you want to go catless we have a few left in stock

[AusX3]

Originally Posted by dinan5m3

The burbles would be least of it.

I guess what i'm trying to say here is, i was drinking out of that DP Kool-Aid, had i known what i know now i would have just gotten a "catless" DP.

The "catted" DP with OTS tunes really has no value, IMHO.

And going "custom" tune on OTS platform even adds less value, IMHO.

But it's your car, go for it, as people say.

''And going "custom" tune on OTS platform even adds less value, IMHO."

I am so confused about your rational, if you would mind elaborating as it's inverse.

Custom tune offers most gain

OTS tune would then be middle ground as its OTS

DP alone least gains - touch quicker spool with stock tuning

[dinan5m3]

Originally Posted by AusX3

''And going "custom" tune on OTS platform even adds less value, IMHO."

I am so confused about your rational, if you would mind elaborating as it's inverse.

Custom tune offers most gain

OTS tune would then be middle ground as its OTS

DP alone least gains - touch quicker spool with stock tuning

eg.

From Cary Jordan:

[AusX3]

Originally Posted by dinan5m3

eg.

From Cary Jordan:

yep, agreed - custom tune is only way to go if available offering the most reliable gains.

Think I understand where you head is at it just didn't read that way from the outside.

Cheers

[dinan5m3]

Originally Posted by AusX3

yep, agreed - custom tune is only way to go if available offering the most reliable gains.

Think I understand where you head is at it just didn't read that way from the outside.

Cheers

Yep, i've ordered the AA catless DP for $399 through local shop (as you can't get this directly from AA, at least when i tried it).

With catless DP, should have no more excuses from OTS vendor.

[Chief Orman]

Well shit…I am going to give BMS a call

[Chief Orman]

And what do you guys do about emissions?

[dinan5m3]

Originally Posted by Chief Orman

And what do you guys do about emissions?

If you have visual inspections in your state then you are screwed, i think.

But otherwise you can code out the catless.

Although i'm not sure if there is such thing as a smell test from idle.

[Chief Orman]

Originally Posted by dinan5m3

If you have visual inspections in your state then you are screwed, i think.

But otherwise you can code out the catless.

Although i'm not sure if there is such thing as a smell test from idle.

I can deal with the emissions bureaucracy, but I am concerned about noise and smell too. I also think there seems to be a lot of hustling to sell catless downpipes

[dinan5m3]

Even from the visual, i'm not sure if one can tell if DP has cat or not.

I plan to have both o2 bungs on my catless.

Originally Posted by Chief Orman

I can deal with the emissions bureaucracy, but I am concerned about noise and smell too.

I'll find out if any drone.

Noise, i think so, will be wicked.

Smell, seems to be subjective depending on who you talk to. But i'm prepared to smell something new.

Originally Posted by Chief Orman

I also think there seems to be a lot of hustling to sell catless downpipes

[Burr001]

https://x3.xbimmers.com/forums/showp...9&postcount=58

video of AA downpipe on stock exhaust

[Score04]

Originally Posted by Burr001

https://x3.xbimmers.com/forums/showp...9&postcount=58

video of AA downpipe on stock exhaust

Can you send direct link to buy? AA site doesn't show x3?

[Burr001]

Originally Posted by Score04

Can you send direct link to buy? AA site doesn't show x3?

I purchased from powerhouse extreme, but I see it went up in price ( almost 100.bucks) on AA and other websites.


https://x-ph.com/active-autowerke-aa...tted-downpipe/

[Score04]

So this will work for x3 even though it’s noted for f30 due to being a b58 motor?

No regrets? Sound overwhelming when driving or good enough?

[Burr001]

Originally Posted by Score04

So this will work for x3 even though it’s noted for f30 due to being a b58 motor?

No regrets? Sound overwhelming when driving or good enough?

No regrets, didn't want something to drown me out while driving on long drives.
Best part no CEL, but its a pricey option compared to other downpipes to help free up exhaust gases from turbo.

there should be a pull down tab to confirm fitment, but you should ask whomever your ordering from to confirm.

[Score04]

That’s great to hear. I was a little confused on this forum if you can tune on catted downpipe or simply install this w out a tune? Are you tuned also or just purchased for the sound?

Other downpipes don’t free up gases from turbo? I’m newer to the turbo world and think owning my rsx type s for 17 years as an original owner I would get a little more educated before I order an x3 m40i.

[Must_Go_FASTER]

Originally Posted by Score04

That’s great to hear. I was a little confused on this forum if you can tune on catted downpipe or simply install this w out a tune? Are you tuned also or just purchased for the sound?

Other downpipes don’t free up gases from turbo? I’m newer to the turbo world and think owning my rsx type s for 17 years as an original owner I would get a little more educated before I order an x3 m40i.

I'll try to be quick and cover all the bases here. So if you are ordering a new M40i, you won't be able to tune it for some time. As of now, only 2020 and older model years are able to be flash tuned.

If you're interested in modifying the downpipe, your options are Hi-flow catted or catless. Hi-flow catted DPs filter less of the contaminants produced by combustion than stock and also allow the gases to escape faster, which improves performance and sound (some smell, but not bad). Catless doesn't have anything and is optimal for high performance, although it will smell strongly and the sound maybe borderline too loud in certain situations.

Most Hi-flow DPs for our vehicle contain 200 cells, which will prompt the computer to throw a code (check engine light). You can code it out with a flash tune, but going back to the first part, you can't do unless it's 2020 MY or older. So on 21-22 model year, your options are to go catless or hi-flow catted downpipe and deal with the CEL, or you order something like the AA downpipe that is in between a stock and a hi-flow cat, honestly. Stock has 600 cell count, AA has 400, and most others have 200. Most option the AA because they don't like the CEL, have to pass emissions, or both. It is much more expensive than I think any other downpipe for ours, that being said.

I'd like to add, that the 200 cell downpipes sound pretty aggressive under heavy throttle, but are almost imperceptible at a warm idle and cruising. Cold starts are the only time that it's a little obnoxious, but that only lasts for a minute or two before it settles down.

Sorry for the long explanation, but hope this helps clear things up a bit. And, just throwing this out there, a low mileage 2020 X3MC is not much more than a brand new M40i

[Chief Orman]

Originally Posted by rdougherty85

I'll try to be quick and cover all the bases here. So if you are ordering a new M40i, you won't be able to tune it for some time. As of now, only 2020 and older model years are able to be flash tuned.

If you're interested in modifying the downpipe, your options are Hi-flow catted or catless. Hi-flow catted DPs filter less of the contaminants produced by combustion than stock and also allow the gases to escape faster, which improves performance and sound (some smell, but not bad). Catless doesn't have anything and is optimal for high performance, although it will smell strongly and the sound maybe borderline too loud in certain situations.

Most Hi-flow DPs for our vehicle contain 200 cells, which will prompt the computer to throw a code (check engine light). You can code it out with a flash tune, but going back to the first part, you can't do unless it's 2020 MY or older. So on 21-22 model year, your options are to go catless or hi-flow catted downpipe and deal with the CEL, or you order something like the AA downpipe that is in between a stock and a hi-flow cat, honestly. Stock has 600 cell count, AA has 400, and most others have 200. Most option the AA because they don't like the CEL, have to pass emissions, or both. It is much more expensive than I think any other downpipe for ours, that being said.

I'd like to add, that the 200 cell downpipes sound pretty aggressive under heavy throttle, but are almost imperceptible at a warm idle and cruising. Cold starts are the only time that it's a little obnoxious, but that only lasts for a minute or two before it settles down.

Sorry for the long explanation, but hope this helps clear things up a bit. And, just throwing this out there, a low mileage 2020 X3MC is not much more than a brand new M40i

Based on other posts some feel that an AA catted downpipe plus a more aggressive Stage 2 just isn't worth it…in other words go catless or don't bother given the otherwise meager performance gains. What is your take?

[Score04]

Originally Posted by rdougherty85

I'll try to be quick and cover all the bases here. So if you are ordering a new M40i, you won't be able to tune it for some time. As of now, only 2020 and older model years are able to be flash tuned.

If you're interested in modifying the downpipe, your options are Hi-flow catted or catless. Hi-flow catted DPs filter less of the contaminants produced by combustion than stock and also allow the gases to escape faster, which improves performance and sound (some smell, but not bad). Catless doesn't have anything and is optimal for high performance, although it will smell strongly and the sound maybe borderline too loud in certain situations.

Most Hi-flow DPs for our vehicle contain 200 cells, which will prompt the computer to throw a code (check engine light). You can code it out with a flash tune, but going back to the first part, you can't do unless it's 2020 MY or older. So on 21-22 model year, your options are to go catless or hi-flow catted downpipe and deal with the CEL, or you order something like the AA downpipe that is in between a stock and a hi-flow cat, honestly. Stock has 600 cell count, AA has 400, and most others have 200. Most option the AA because they don't like the CEL, have to pass emissions, or both. It is much more expensive than I think any other downpipe for ours, that being said.

I'd like to add, that the 200 cell downpipes sound pretty aggressive under heavy throttle, but are almost imperceptible at a warm idle and cruising. Cold starts are the only time that it's a little obnoxious, but that only lasts for a minute or two before it settles down.

Sorry for the long explanation, but hope this helps clear things up a bit. And, just throwing this out there, a low mileage 2020 X3MC is not much more than a brand new M40i

I appreciate you taking the time to explain this. Is it okay to make this downpipe mod without a tune? If yes, does the car gain 20-30 whp with just this mod or there's no noticeable gain? I'd like to consider giving the car some more sound since reading people have stated the stock sound is bit more muted after 2020 year model and would like to gain about 40-60 whp and nothing more. I guess I'm seeking best route for my needs based off of this explanation. Thank you in advance to anyone.

[Burr001]

Originally Posted by Score04

I appreciate you taking the time to explain this. Is it okay to make this downpipe mod without a tune? If yes, does the car gain 20-30 whp with just this mod or there's no noticeable gain? I'd like to consider giving the car some more sound since reading people have stated the stock sound is bit more muted after 2020 year model and would like to gain about 40-60 whp and nothing more. I guess I'm seeking best route for my needs based off of this explanation. Thank you in advance to anyone.

My understanding is that to take advantage of any downpipe being installed a tune is needed to gain hp, if no tune, the downpipe is just expelling exhaust gases quicker and naturally helps lower back pressure on the turbo.

[dinan5m3]