Quote Originally Posted by VIP Style
I have a Dseries motor(y8) and I was wondering what does "head work" mean exactly and would it be a waste or will i see some decent gains.
on your car, i'd be a waste unless you were/are going to build ur entire motor. It's benefical if you go boost for better flowing, well it's better in every category.

port and polish, valve job, bigger valves, cam(s), and valve springs.