Being a 2001 yes it is mass air. Honestly for the power you will produce a 65 mm TB and 19 lb injectors will work. When tuning get your AF ratio and MAF transfer function right and you will be good. For that car I wold bump up to a 190 lph fuel pump also. Everyting you can get from a bone yard.
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Chuck
1992 Calypso Green Mustang notch
1995 Mustang GT
2004 Explorer Limited
A veteran is someone who, at one point in one's life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including my life'. That is honor, and there are way too many people in this country who no longer understand it. -Author Unknown
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