i think gears are the 1 thing lacking most in the import scene... all my v8 and truck friends constantly remind me that without using the best gear ratios, all the cash we spend on power upgrades isnt giving us our maximum results
BUT
if you drive your car everyday and not just to the races on the weekends, its not worth it.... my friend has something nuts like 5:13 or 5:17 on his truck but he *never* drives it