Garfield, Bosch do a hot film MAF sensor with voltage output (0280217107) which is approx. 90mm diameter and max. flow rate of 1080 kg/hour - not sure of the conversion to cfm, but it's a lot! Only oem applications I am aware of are Bentley R turbo and Mclaren F1 road car! In the UK they cost approx. 200 of our pounds. Maybe of interest?? Rich.