I agree. This is the type of mod you do after you've done all the biggies and you're just trying to squeeze out every last bit of power. On the stock k03, it's not really worth it, because all the sum-mods will soon add up to a k04, so you might as well go there, unless you have some particular reason why you'd want to keep the k03.I read some have trouble with the under drive pulleys. You will lose all benefits of having a harmonic balancer by removing the oem pulley as well. I have Agency Powers pulley because it has the oem diameter so no under drive issues. You won't feel any difference in power with this or any minor hp-gain mods. I call these Sum-mods because when you add/sum all of the minor mods together they add up, but alone, no.