How can a tach be a waste of money? If its manual transmission dont you like being able to see what RPM youre at? There may be certain tachs that might be a waste of money depending on application (to some, not others), but I dont think having a tach is a waste
Iwould definantly have to agree with that. I had an '87 blazer 4 speed manual with no tach and it was just annoying.