It states on burger tuning that it helps with shifting, (boost response, spool up, shifting performance, and overall feel.)but yes its only in sport mode comfort is fine, and i make plenty of power my 0-60 times are higher than some peoples with more mods i only have a jb4 with no other performance mods and run a 4.2 regularly and have hit 4.0 on colder nightsAre you having this problem when you are in sport mode? I just purchased the JB4 for my 2018 Stinger GT2 and should have it put on sometime next week. I'm going to order the EWG wires as well. I don't have the problem you're stating, or 100% know if the EWG wires will help. I've asked about the EWG wires in the forums and from what I've been told they are made to control your wastegates on the turbos so you can limit your maximum boost output so you don't run into issues with over-boosting. I'd recommend getting the EWG wires for your JB4 even if they don't fix the issue you stated, for the liability of your engine. What exactly is your car struggling with, downshifting after slowing down, or are you having problems making power? What other mods do you have other than the JB4 if you do?