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I put a JB4 on my F55 base and won't turn back. Amazing product and even better support from Terry and team. If that's your cup of tea, you can't go wrong there.
I put a JB4 on my F55 base and won't turn back. Amazing product and even better support from Terry and team. If that's your cup of tea, you can't go wrong there.
It's a piggy back tuner that plugs into the MAP and TMAP sensors and also the OBDII port. It's easily removed and reinstalled. As for warranty, my understanding is that the dealer must prove it caused an issue in order to deny warranty service. Clearly use at your own risk, but simply installing it does not "void" a warranty. I'm relatively sensitive to warranty issues and have no plans of removing it unless it goes in for service. Hope that helps.
I have the JB4 and a throttle controller in my F55 S, it does make a very big difference. It probably feels faster than it really is but it is so much better than stock.