Does anyone know at which point, after adding mods will the A/F mixture change and start to run lean? I have a JWT pop-charger, Borla TD exhaust, Kinetix High Flow Cats and plan to add a pair of headers soon. Will these mods contribute to my Z running lean? If not, what will?

 

I would start to dyno just to be safe.. Every car is diffrent so be safe and find out what your car is doing...

 

What do you think of Air/Fuel guages? Is it practical?