are you talking about right out of the box or with some work done such as porting and polishing? Right out of the box AFR 165's are untouchable...TrickFlow heads can be ported and have a bigger potential...but than again there is the AFR 185's...Dollar per dollar the AFR's are just a better buy for the performance you get...Intakes really make no difference expept that the new edelbrock RPM II is CNC so the quality is a bit better...