I am looking at "performance chips". My Nissan Sentra SE 2.0 is already pretty fast. While I was car shopping I found that Nissan cars were hard to find used. People were keeping these and not selling. I went back to college in 2000 and later. I studied electronic engine controls. If a performance chip overrides the ECU of my Nissan, that would be great. If anyone has had bad or good luck with these chips please let me know. Thanks, Paul D. 0
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