To my knowledge the new throttle body is oem, I’m not sure about the EGR delete or the catless downpipe. The only mods I know of is an aftermarket BOV and a “stage 2” clutch. Not too sure if it’s ever been tuned, never came with an access port.
Hey, Im trying to fix up this 2011 mazdaspeed 3 that runs terribly. Im trying to do this without spending an ungodly amount of money, so I want to make sure I get the right parts. the battery is junk, the car starts and barely idles around 5-600 rpms. doesnt have throttle response until 3/4 to...