well considering all 4 jets should cost about $12 to $20 depending where you get them, yes, insane and criminal in my opinion. $160 to install probably isn't too far out of line considering what I have seen for shop labor rates. Still way too much considering how easy it is to do yourself.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!