Best Jdm B16a1 Ecu?

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Senior Member
Looking into the future on a 88-91 jdm b16A1 and would like to know what the best ECU would be (performance wise) for this motor. Just doing some research. And yes I did look through previous threads. Couldn't find info on this. And what difference does like a mugen or jun chip make on the ecu besides the redline? does it really help? thinking about buying one for my PM6.