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My JB4 is sitting in the box in my garage since I went MHD. My car ran fine on the JB4, but had some issues in really my cold temps. I wonder how the JB4/MHD combo performs vs a custom MHD tune? Either way, awesome people are making power in different routes!

The JB4 alone outperformed the MHD stage 2 flash??

YES - you will even notice some rasp, on aftermarket exhausts when going from OEM downpipe to a quality catted DP, like AA

Link?? Should have done it when the ECU was with FEMTO

Yes sir

How bad is this install?? That’s the only thing that deters me.

No sir! When I flash MHD I get a CEL for battery something that goes away after a start / stop cycle. Might be the trickle charger I use when doing a long flash? Anyways. Excited to get the stage 2 stuff back on.

Driven a few drive cycles on Stage 0 MHD and the OEM downpipe selected. I don’t think the stage tune matters, but having the OEM downpipe should. Quick scan with an Amazon scanner shows I should be good for inspection now….should.

What does it do in aux or diagnostic mode?? On and off the trickle charger?

And I make fun of people for asking about oil. I should be shamed. :imnew:

May have just answered my own question in the user guide. Need to select OEM downpipe.

I think the ‘OEM downpipe’ option on MHD puts it back to a ready status. Will try that

*Resolved at the bottom * For state inspection, we have to plug in OBD2 to make sure the o2 sensor is on or ready. Should I flash to MHD stage 0? Or toggle the option back to stock downpipe? Both? I have a catted AA DP which passed for years. Just want to be sure which flash I should use.

Have you deleted the active sound? Even the stock catback and aftermarket downpipe can seem loud in the car with the fake exhaust noise. It’s absolutely worth the $$ for a decent OBD2 dongle and BimmerCode!

Well, if you ever find yourself up in NH I’ll help ya swap them out! do you have a downpipe? I was shocked how loud the car is, first time with an exhaust as well

How far? What don’t you like about MAP? AWE is just the best sound. It’s crazy

Time for some iRacing, I have never seen the track in person and have hundreds of laps on it. By no means would I be fast, but I would have an inkling on how to get around it.

Bump!

You seem like you'd max your burbles and take BIG FLAME videos for social media, so no.

Such a stupid and pointless mod, unless you're name is...