jtsang25
Well-Known Member
You can "tune" the jb4 and get a custom map. Not as extensive as what you can do with a full tune, but custom jb4 smooths alot of things out.Definitely noticeable and worth the money. The only other thing I have aside from the Jb+ is an ARK DTS exhaust. I've been considering upgrading to jb4 but I read some stuff about some people not liking the power delivery from it..? I enjoy the Jb+ and the way the car feels so not sure if I'll upgrade
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