Anyone has it, and what's your impression?
I have it on my C43 and it's a really good bang for the buck, but I haven't noticed anyone using it on the 63 platform. BMS's website has dyno's of E30 and race gas mix, but none with pump gas. Anyone!

https://burgertuning.com/collections...mg_c63_e63_jb4

2018 AMG C63 with BMS Intake, 30% E85


2018 C63, JB4, BMS Intake, BCM, Race Gas Mix

I had one on my car for logging purposes but then switched tuners and use it in between finding a new tuner. Definitely map6 with some fine tuning is awesome. Super easy to install as well.

I have it still installed but don’t use it. If you’re looking to buy one I can sell it to you! I’m tuned by eurocharged and use the HP tuner for logging so it’s unused.

PM me I can save you some money as I have no use for it.

Have you ever had it alone, without a tune?

yes as I said before when I was in between tuners I used the JB4 alone. It works great if leasing a car or if you are nervous about warranty.

mine has the Bluetooth connect so you can switch between maps off your phone in seconds.

Hey man have u sold it yet?