Tonsil & Slot Style MAF Flanges in Aluminum and Steel, allow your MAF sensor to be mounted directly into your intercooler tubes.
Tonsil style sensors are found in 99-04 Lightning 80mm and 90mm MAFs, 03-04 Cobra 90mm MAFs, 02+ Mustang GT 80mm MAFs, SCT Big Air 2400 through 3000, and several others.
Slot style sensors are found in 05+ Mustang V6 and V8, and 04+ F150 5.4 3v MAFs.