Oh ya, for the Z car and it's fuel injection sensors and all.....which is better, electrical guages or mechanical? I'm going to rewire while I do this, so I could go with new sending units and sensors while I install the Painless harness. Just not quite sure if one type of guage is reccomended above the other type on certain guages. And I know people say their boost guages are off by a few PSI, but I'm not going to be running anywhere near the max boost my engine will hold or the turbo will output...so if I think I'm running 15 and actually running like 17, that's no biggie.