Spectre's universal mass air flow sensor adapter is designed to allow you to add a 3 inch flange to your mass air sensor housing. This setup allows you to attach a 3 inch clamp-on air filter or a 3 inch diameter tube directly to the stock mass air sensor...

SCT Performance 90mm Mass Air Meter for 89-08 Mustang / 99-04 Lightning/Harley (up to 725RWHP)

SCT Performance 90mm Mass Air Meter for 89-08 Mustang / 99-04 Lightning/Harley (up to 625RWHP)