Yellow box questions for 4.57
#1
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Join Date: Nov 2002
Location: Murfreesboro
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Yellow box questions for 4.57
I am about to do this mod, the 4.57's, and was just wondering if the other board members out there with aftermarket gears bought the yellow box or not. If not how much of a inaccurate reading does the gears give. Also what is the average price for this mod.
#5
With the Yellow Box, it would (+). And since the stock speedo is anywhere from 1 - 2% off to begin with, if you want it dead on, start with 13% and get paced by a police car or check it with GPS, then go from there.
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#9
Former Moderator
Realize that without the yellow box, in addition to speed being off your odometer will increase quicker as well. This could affect warranty and resale because the car will indicate higher mileage than it actually has on it.