Originally posted by racingkid39
I wrote the values of my upgraded Chevrolet Corvette RM '09 and I tried to put the values of the supercharger, manifolds and the air filter and put them on the NASCAR. When I try to put it in the game, it doesn't show up on my car and the horsepower is still the same.
Just checking (always gotta cover the basics first), but did you do the FF to 74 thing?
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Also, what do you do as soon as you start the game up?