Hi,cone filters offer better air intake because it has more surface area, but if you havent got a cold air feed and heatshield there will be alot of heat soak from the engine. My m8 had a 140celica and had a induction kit fitted and it felt hesitant and slower to respond. We now know why :) , its because the induction kit we had, had a bigger bore(circumference) pipework compared to stock. This then has less air pressure because of the bigger pipework the air mass picks this up and for some reason this causes a bogging effect before acceleration occured. We then modified the original airbox pipe so that we kept the original bore pipework, after we modified it it had no hesitation and a strong response over standard :). So long story short lol if you get a induction kit mak sure the pipework is the same diameter :)