[cc009]

Also does changing Downpipe throw a service code light? Thanks!

[chenry]

Originally Posted by cc009

Also does changing Downpipe throw a service code light? Thanks!

A good catted DP….no. Catless….yes.

[cc009]

Originally Posted by chenry

A good catted DP….no. Catless….yes.

What's some good catted ones? And I'm guessing you can find out before purchasing if would or not

[chenry]

Originally Posted by cc009

What's some good catted ones? And I'm guessing you can find out before purchasing if would or not

I have CG Precision DS-1 catted that I ordered from Mike at x-ph I am quite happy with it.

I believe AA claims no CEL on their unit (but I might be wrong on that)

[mike@x-ph.com]

Originally Posted by cc009

What's some good catted ones? And I'm guessing you can find out before purchasing if would or not

I recommend the Active Autowerke for a no CEL guarantee

Other options include Akrapovic, CG Precision and Fabspeed

Originally Posted by Vmaxx

But isn’t that for a stock car? I think it would be more for a car with a DP and JB4 because it’s more boost and less restriction on the backend?

I would think so but I do not have any comparison dynos

[Vmaxx]

Originally Posted by cc009

What's some good catted ones? And I'm guessing you can find out before purchasing if would or not

I second AA, I’ve been running it for a few months with excellent results.

[Vmaxx]

Originally Posted by cc009

Ah I see do you by chance have any close up images where it is from under the dash and in the engine bay? That's the only part that I haven't been able to visually see with the instructions they have online and the YouTube videos are on older models than 21

It’s actually really simple, once you take off the cover under the driver side dash you should see an arrow on the lower left pointing right up at the push point. It’s embossed in the plastic and dark so just use a flashlight to spot it. I recommend using something at least 18in long so you can see it pushed thru on the other side. Leave it in place, then take the JB4 wire from the engine bay side and secure it (i.e. tape it) to whatever you used to push thru the cover and then pull it back thru to the interior side.

[Vmaxx]

Here are some photos.

[cc009]

Originally Posted by Vmaxx

It's actually really simple, once you take off the cover under the driver side dash you should see an arrow on the lower left pointing right up at the push point. It's embossed in the plastic and dark so just use a flashlight to spot it. I recommend using something at least 18in long so you can see it pushed thru on the other side. Leave it in place, then take the JB4 wire from the engine bay side and secure it (i.e. tape it) to whatever you used to push thru the cover and then pull it back thru to the interior side.

Wow thanks for explaining that and even sending some pics! Really appreciate that. I am going to check my car out tomorrow to find it. Inside the hole, is that the cover pushed in which looks like rubber? I don't see wires from jb4 running through so was just checking if I'm on the same page. Haha I'm sorry I'm new to this but trying to learn!

And also for the AA catted downpipe, is this it?
https://www.ecstuning.com/b-active-a...58/11-062~aaw/

[chenry]

Originally Posted by AlphineW_M340i

Boys I’m running jb4 map 5 e30 mix on my 2021 m340i and also have downpipe with a intake and let me tell you how insane it is. My car literally flys I have gapped a e92 m3 and a 5.0 mustang atm and it’s crazy I will be getting it dynoed soon and will post results

Great decision with your 21 and congrats! And if you are enjoying your JB4 boy oh boy do you have something to look forward to when the 21 DME's finally get cracked for a flash option (whenever that may be)

On my 2017 340 I started with a box (tried a couple different ones) and it was okay while we waited for the first gen DME's to get cracked - once a flash was available I switched and it was absolutely next level in terms of drivability, overall power and linear power delivery. Fortunately for me my 20 came with a DME that could be remotely flashed so I did it myself at home.

It's good you are running E30...we really need that here in CA vs our 91 crap gas.

I'm in HB by the pier if you ever want to connect and compare notes hit me up.

ps- the LA BCCA chapter is doing a BMW meet and greet next month at the John Wayne Airport - Lyon Air Museum...it looks like it's going to be a great event

https://www.media.lyonairmuseum.org/cr2021

[Vmaxx]

Originally Posted by cc009

Wow thanks for explaining that and even sending some pics! Really appreciate that. I am going to check my car out tomorrow to find it. Inside the hole, is that the cover pushed in which looks like rubber? I don't see wires from jb4 running through so was just checking if I'm on the same page. Haha I'm sorry I'm new to this but trying to learn!

And also for the AA catted downpipe, is this it?
https://www.ecstuning.com/b-active-a...58/11-062~aaw/

Yeah that’s the one. Oh those pics were before install.

[S58King]

Originally Posted by chenry

Great decision with your 21 and congrats! And if you are enjoying your JB4 boy oh boy do you have something to look forward to when the 21 DME's finally get cracked for a flash option (whenever that may be)

On my 2017 340 I started with a box (tried a couple different ones) and it was okay while we waited for the first gen DME's to get cracked - once a flash was available I switched and it was absolutely next level in terms of drivability, overall power and linear power delivery. Fortunately for me my 20 came with a DME that could be remotely flashed so I did it myself at home.

It's good you are running E30...we really need that here in CA vs our 91 crap gas.

I'm in HB by the pier if you ever want to connect and compare notes hit me up.

ps- the LA BCCA chapter is doing a BMW meet and greet next month at the John Wayne Airport - Lyon Air Museum...it looks like it's going to be a great event

https://www.media.lyonairmuseum.org/cr2021

I appreciate the love brotha looking forward to that meet if I can come will hit u up if I do