I like the look of an air gap intake - but the basic idea of it is to keep the air fuel charge cooler. Really? impossible as the residence (cooling) time from air entrance into the carb to the combustion chamber at any rpm is measured at the third decimal point of a second. If it looks nice, the price is right, then the air gap will be your best bet. The positive effect is that these intakes tend to straighten the air flow as they are a bit higher.