ok i have a 97 st and id like to change my pulleys theyre cheap and i heard they do restore some power, ok whats the differnce between the two and which one should i get first
underdrive,overdrive - 6G Celicas Forums
I hear good things about the underdrive pully.
I have an underdrive pulley. The ASP pulley that's in the parts database. I honestly didn't notice much difference if at all. But, when I run my AC, I do notice a difference. It dosn't seem to rob as much power as it used to.