go check your pro m meter first. if you bought it recently then it may already have a 6 pin maf with an adaptor harness already on it. if so then you will only need the air filter adapter and air filter---maf of course.
i bought my maf at buyfordracing.com for $80. got the airfilter adapter at blue oval chips, and i also bought the harness from them before i noticed my pro m already had it. i also had a 4" opening air filter laying around. i don't have pics of mine and it wouldn't do you any good cuz its on a turbo setup anyways.
oh yeah you will also need a chip or tweecer to make it work.