3:08 to 3:73?

[Mark99gt]

Thanks for the reply. Yep I have a 5 speed but Ive read on a few places that the 99 and 00's need to get a computer controlled speed compensator.. Ive heard of Abbott Speed Compensator but havent been able to find it to buy it. Im just wondering if a Superchip can do the same thing as this compensator because they dont need me to tap into any wires. Does anyone out there know of any other things to correct the speedo on a 99 gt?

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99 GT convertable, 5 Speed, K&N w/silencer removed.