i think the sways will make a bigger differance than the FSTB. all STB do the samething. u notice more from the rear one than the front. but lots notice the sways too. it mainly depends on how much curvy driving u do. i would go for the $250-300 sways b4 the $400 FSTB. u will get more from then. but that FSTB is a more show piece than the sways. it's all in which way u want to go.