E53 M54 Exhaust Headers

[Happy]

Originally Posted by aheckenast

I highly recommend it!

Their already in the mail!!

Thanks again, for the purchasing tip.

[Happy]

Originally Posted by aheckenast

I highly recommend it

Thank you for helping me gain access to these headers! They are fantastic! I was so close to giving up on trying to order them!

[aheckenast]

Originally Posted by EODguy

Nothing quite as permanent as a "temporary" government program....

Sent from my SM-A730F using Tapatalk

It's been shut down since about 5-6 years ago. I feel for you guys down in the states..

Sent from my Pixel 4 XL using Tapatalk

[e39_touring]

Originally Posted by aheckenast

The catless exhaust smell is noticeable at times but way less than I expected.

Overall I am very pleased. Highly recommend these if you don't mind going catless on the 3.0i.

Good job on the install! I highly recommend flashing the eu2 tune (factory euro catless tune). The exhaust smell will go down 80-90%, no cel, and you'll see a little better mileage. Without the rear o2's, the x is running pig rich as the ecm is constantly testing catalytic efficiency.

[Happy]

Well.. Well.. Well… Lookie hea.. Lookie hea..!

What a surprise today when the door bell rang!

[crystalworks]

Originally Posted by Happy

Well.. Well.. Well… Lookie hea.. Lookie hea..!

What a surprise today when the door bell rang!

Attachment 81027

That's going to be awesome. You keep this up and you ARE going to end up with the LeMans X5 sound/feel.

Is it going to require additional tuning? I think you said you are using a DME that is a one-off type thing.

[Happy]

Originally Posted by crystalworks

That's going to be awesome.

It was a dream Crystal.. LoL… It was supposed to stay a dream. Do you know how much concrete I would have in my back yard right now!!

Originally Posted by crystalworks

You keep this up and you ARE going to end up with the LeMans X5 sound/feel.

Yeah riiight! ZHP Cams, and Big Brakes, and it’s pretty much there. Sheesh!

Originally Posted by crystalworks

Is it going to require additional tuning? I think you said you are using a DME that is a one-off type thing.

So I have 3 types of electronics in my E53. DME, E85 ECM, and a secondary injection ECM. The BMW Doctor states that, the collectors as he calls them, provide more power based on the rearrangement of the exhaust gas discharge dynamics.

It makes sense, make more power by making things more efficient. My 2 Stroke with a carb, made waaay more power with a chamber that was extremely tuned!

So, where I luck out is, my E85 ECM is constantly tuning in real-time. It’s a byproduct of the system, because it’s an actual Flex-Fuel system. So if there is E10, E50, E85, E100, etc. it has to tune accordingly. So far the DME has been consistent at throwing timing at the system.

So, if the head is running cooler with the ethanol, and the exhaust discharge is creating a cooler environment as well with less heat and pressure, then one can assume the DME will throw more timing. Where the end is at, is anyones guess.

One thing I can say is, my boost should be greatly affected in a positive way. My blower will no longer be blowing directly into the cats. This should allow it to produce boost more quickly and efficiently, and may even allow the pressure to rise a minuscule amount. I’ve seen it hit 11lbs before. If it were to get closer to 12lbs, that would be in my opinion the most boost acceptable on stock internals. It’s right there!

We will see soon!

[Happy]

Originally Posted by crystalworks

You keep this up and you ARE going to end up with the LeMans X5 sound/feel.

The revs in that quick vid, were only to 3800 rpm.

I don’t know about feeling anything thing like the P75 as far as power output (only half the engine, LoL).

But the sound is bonkers!

[aheckenast]

Originally Posted by e39_touring

Good job on the install! I highly recommend flashing the eu2 tune (factory euro catless tune). The exhaust smell will go down 80-90%, no cel, and you'll see a little better mileage. Without the rear o2's, the x is running pig rich as the ecm is constantly testing catalytic efficiency.

Did you do it yourself? I've been holding off as this is my daily while my project car is apart, don't want to accidentally brick the dme.

Sent from my Pixel 4 XL using Tapatalk

[e39_touring]

Originally Posted by aheckenast

Did you do it yourself? I've been holding off as this is my daily while my project car is apart, don't want to accidentally brick the dme.

Sent from my Pixel 4 XL using Tapatalk

Yes, it's very easy if you're somewhat familiar with inpa/winkfp, etc. It's been a while, but if you have questions, post them up here, and I can walk you through it. There are lots of videos online as the process is the same for the e46, and a lot of those guys run the eu2 tune. The only difference is you have to select the calibration suitable to the euro version of your x.