Join Date: Sep 2002
Location: Melbourne , Vic
Re: heads im confused
Okay, from what i know the GT40 head's are an aftermarket aluminium job from SVO. The $1100 GT40"P" head's are a cast iron, money friendly production version of the GT40's, but may have different sized valves, combustion chamber size ect.
I also understand that if you're aiming for decent numbers an aftermarket, aluminium head like AFR's are more cost effective due to the future potential/ weight saving/ porting costs/ that the GT40P's carry.