Originally Posted by jschmid
I'd invest that $1500 in some performance springs, shocks, and tires. That'll make you faster (at least on fun roads) than engine bolt ons.
exactly, simple engine bolt-ons are pretty much useless as you can see no more that 10whp gain max.
save that to handling (suspension, tires, swaybars, etc), it'll improve your ride quality better.
I/H/E don't do much at all.