2010-2013 Mazda 3 Engine and Performance
I bumped into these people called Jet Performance that are lower priced ($300)than Dynotronics ($450 for 2.0 and $550 for 2.5) but not so sure just how trustworthy these people may be. Has anyone heard of them? I'm still going to stick with Dynotronics since I've already got the tune with them...