anon2k2
Active Member
I had (well still have, but unused) a JB+ installed for a couple of weeks but got the upgrade bug and ended up getting a JB4. My 2021 Supra has a locked ECU so a piggy-back is my only option.
I didn't have any issues with it, and while I don't have official dyno numbers, there was definitely a noticeable increase in power, especially from 3,000 to 4,500 rpm. No CELs or codes, no weird throttle response or hesitation.
Everything worked really well from my view.
I didn't have any issues with it, and while I don't have official dyno numbers, there was definitely a noticeable increase in power, especially from 3,000 to 4,500 rpm. No CELs or codes, no weird throttle response or hesitation.
Everything worked really well from my view.
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