Cold Air Kit

Ram air air will provide 15- 20 hp.
Intercooler, I don't know enough to make an educated guess on that.
A friend that has an intercooler that dry ice is put in that made a seat of the pants feel increase.
I cant see that removing the filter from the compartment will provide much extra hp. I would concentrate on cooling the fuel, ex. , Insulating fuel lines, wood carb spacer, fuel cool can. etc. I have read that very cool fuel, not too cold as it will decrease the temperature needed for flash point , can add up to 20 hp