13 May 07, 10:35 pm
With the 4.56 gears, the truck is really turning some pretty high RPMs. Bigger tires will help reduce the RPMs some, but I'd like a tach anyway. Anyone install one before? From what I've turned up so far, there is an Autometer one that installs on the alternator but my have some accuracy issues and an Issopro that you glue magnets on the harmonic balancer. Any other product?
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