Hello Iím new to the forum.. recently my 2006 Mazda 3 2.0 hit 120000 miles and a bunch of maintenance needed doing on it. This forum had a lot of answers so I figured I would join. Recently I changed all shocks and struts, pulled the throttle body and cleaned it, cleaned the mass air sensor, changed spark plugs, pulled and cleaned injectors, added a ground wire from the throttle body to the negative lead on the battery, and removed the intake resonator and added a 3 inch flexible tube to the bottom of the air box and routed it to a High flow area just above the left fog light. Itís performances much better. Open to any ideas to optimize this thing. Thanks!