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^^^ But are not that accurate^^^
I used a friend of mine's for a few days and it said I had 115 horsepower and did the 1/4 mile in 16.4 seconds.....and I DID plug in all the correct numbers and followed the instructions exactly.
btw...I had 175whp and did the 1/4 in 14.7.....
they are a waste of time and money IMO.....just go to a track
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