Adjustable mass air meter?
 

Who make these meters and where can i get them.

I have never seen a adjustable Mass Air meter. But Interactive Technologies has the Air Adjuster that allows fin tuning of the meter, and Pro-M offers the Optomizer which also allows adjustment.

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Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon!

The optimizer is an adjustable mass air meter, but its a piece of crap. I had one, sent it back twice, still didnt work right, and finally got rid of it.

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1993 GT/AOD
'93 Mustang GT

I have the Pro M Optimizer on my car and it works great. Last time I was on the dyno I gained 15rwhp and 14rwtq just from adjusting my AFR with the Optimizer. I'd recommend it. http://www.mustangworks.com/msgboard/cool.gif

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'92LX hatch, 302 w/TFS Street Heats, Performer RPM intake, Crane cam .499/.510, Crower 1.6rr, 70mmTB/EGR, Pro-M 75mm Maf, SVO 30lb injectors, BBK underdrive pullies, 190lph intank pump, BBK short headers, MAC 2.5" off road X pipe, FMS King Cobra clutch, 3.73 gears, SVO upper arms, HPM Megabite Jr. lowers, Moser forged axles, lakewood driveshaft loop, air pump removed