Toyota Supra JB4 Tuner | Plug-and-Play Power for A90/A91
If you’re seeking a reliable and powerful performance upgrade for your A90 or A91 Toyota Supra, the JB4 tuner is the go-to solution. Offered by Paradigm Engineering, the JB4 delivers a true plug-and-play experience that enhances boost levels, refines fueling, and unlocks the full potential of the B58 engine — all without permanent modifications.