air flow meter
 

Where can i get an air flow meter off of an 86-88 Rx-7?

What exactly will that do for us who have naturally aspirated engines? I thought I read somewhere that it really only benefited those with a turbo ....

it does nothing below 6000rpm that the stock one can't do just fine, although the RX7 meter will boost about 5hp above 6000rpm.

So if you spend time way up high, go for it. If not, it's not really needed.

here's my how-to guide if you decide to get it.
http://www.automediazone.com/pro/VAF.htm

It does help below 6k rpm. You can feel it start to help around 4k rpm. Some of my other mods may have enhanced this though. So, it may be different for your car.