im thinking about shaving my gs-r head 40 thousands would this be worth it or no? i have type r cams, comptech headers, greddy evo exhaust, aem cam gears, iceman cold air.. what do u guys think?

 

Having your head milled will raise the compression. It should help make more power, but probably only a few. Especially since we're talking about the smaller Japanese horses

 

You can do it, but it's not the best way of increasing compression...you mess up the quench areas and when you mill the head, it also changes your cam timing significantly, meaning that you'll need cam gears to get back to stock cam timing. Also, your timing belt won't be as tight unless you install a B16 belt.