I just bought a 99 v6 mustang with a stage 1 roush kit put on it, which im pretty sure is just exhaust and body kit. But I was just wondering where the best place would be to start for some cheap horsepower gains. Not even necessarily horsepower, but acceleration. One thing I dont really know too much about is gears. You can order performance gears for v6 mustang for about 180. (3.73 and 4.10) What would these do for a mostly stock 99 v6 stick? Or how else should I start upgrading.