My questions would be:

Is this a factory gauge?
How accurate is it?

I tend to fall back on the old Smokey Yunick philosophy of 10#/1000RPM being adequate.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250