I am planning to install an Injen CAI on my Maxda 2. My two previous cars were Subarus ... a 2002 WRX and a 2006 Legacy GT. A cold air or ram air intake was not recommended for those cars as they caused difficulties with the air/fuel ratio readings which resulted in the cars running too rich even when tuned. I gather that increasing air flow into the Mazda 2 NA engine via a CAI or a SRI is a desirable modification rather than something to be avoided.
Also does someone know a reliable and knowledgeable mechanic at a shop in the Toronto area that I can go to to get the CAI installed and hopefully slightly modified as my car is an automatic and the only CAI that Injen sells for the MZ2 just now is specified as for manual transmissions only?