I just got my 2016 Mazda3 i sport, and I was hoping to do a few things to give it a few more HP. I don't want to make it take a hit in MPG though. I was thinking of replacing the OEM air filter with an AEM one (we're at 48k miles now anyways), but does anyone have any other suggestions?
What some other simple and relatively-cheap mods?
What some other simple and relatively-cheap mods?