Aluminum Heads

Most of the aluminum heads ,(except Trick Flow) have open chambers of 84-88cc with little or no quench . So , with a flat top piston the gain is not worth the expense , except for the weight reduction . I you have a flat top piston with a 73-76cc chamber your benefit is : weight reduction , increased compression and quench which will help with detonation . domed pistons are a whole different ballgame .