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for aftermarket ECUs, ive found it really depends more on who your tuner is and what he prefers to work with. mainly though you cant go wrong with VIPEC or HALTECH but again for myself personally, i would ask the tuner what to go with. racing greed is one of the revscene vendors that has a dyno and can tune your car for a decent rate.
but what mr2?
what engine mods?
whats your budget?
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