Mazda 3 ecu tuning
#2
Nowhere that I know of. If you have a highly modified Mazdaspeed3 and you're looking for a way to keep your AFR's within reason on your stock ECU, check out Cobb's access port.
http://www.cobbtuning.com/categories/?id=3112
http://www.cobbtuning.com/categories/?id=3112
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