Quote:
Originally Posted by SfValley335i
First update your jb3 cable.
Advantage of bms flash using cobb ap and jb4 is better boost control and smoother throttle. You can also run more e85 mixture.
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So, to upgrade to the jb4 harness, do I just find a jb4 cable and connect? Also, do all jb4 g5s (ISO and pre-ISO) have the same harness?