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  1. JB4 on 2023 2.7 EB

    In case anyone doesn't want to wait however long it takes (or if it even happens with the new ECUs from what I've heard) for 5star, Livernois, etc. to release a tune for the 2023s, I'm pretty happy with the JB4 on map1 91 octane. Adds a significant boost to acceleration and it takes about 5...