vac/boost guage
 

I picked one up even though my rx7 s are na. I also have the emissions equip removed and the rats nest gone. Where can I tap in to hook this gauge up. I was reading about how it can help mpg and diagnos vac leaks, so I figured this could be useful. Ty for any input.

You can use the vacuum line leading to the stock boost/pressure sensor on the passenger shock tower.

Ok cool I know exactly what ur talking about, ty Aaron.