http://www.autochipsdirect.com/
Anyone know anything about it, will it ruin my engine or will it actually work?
What about this one
http://www.performancechipsdirect.com/Mazda/Miata/
or this one
http://www.engineperformancechip.com/mazda-performance-chip-mazda-mx5-miata-1990-2012-c-24_478/power-performance-chip-x2-p-8
Its for a 1990 Mazda Miata
David Beierl
Favorite Answer
http://www.performancechipsdirect.com/Ma…
or this one
http://www.engineperformancechip.com/maz…
These two "work" by lying to the ECU about the air temperature coming into the intake. I think they're both total rubbish. Even if not, their claims are wildly exaggerated.
http://www.autochipsdirect.com/
This one I'm not certain about, but I believe it does the same thing except through the OBDII diagnostic port. Again, probably rubbish and definitely not remotely like the claims they make.
Lying snake-oil salesmen all, as far as I'm concerned.