Quote:
Originally Posted by batman_4
i was at 158mph and it's stock. it will get to 160+ just not at fast as a bolted Z IMO
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I would honestly question the speedometer then (especially if it's stock because the computer limits you to 155). I've done a lot of math on this (as seen in other threads) about how much power it takes to get to certain speeds based on aerodynamics, weight, rolling resistance, power, etc.
Take a GPS system with you next time to see how fast you're REALLY going, because I really don't think those speedos are that accurate beyond 100MPH.