Just a heads up- not bashing.
I have a 2018 M240 Xdrive with 17k miles, I have installed:
-Intake
-Catless DP
-TU Fuel Pump
-Vargas GC Hybrid Turbo
-JB4 Piggyback w/meth control
-Port Meth injection w/7th nozzle in DP for cooling
-xHP Trans flash set to Race
I added a MHD BEF, which is really a JB4 product. After adding the BEF I would go into limp mode from time to time.
JB4 was helpful and thought the tune was clashing with the xHP, so they tweaked the tune and I reloaded it.
Took care of my limp problem
But I could tell right away it was not launching/shifting as hard/fast.
Went to drag strip and best I could get was a 12.5@112mph, which is very disappointing. The tweak nerfed the other mods so much it took it back to almost stock performance!
So off came the BEF. Just giving a heads up because I spent $550. to make my car slower.
