There was a Focus guy who just put his stock MAF element into a 3" exhaust pipe. Used the SCT to figure out the MAF transfer function. Punched everything into the program and it was good to go.

That also would be cheaper than a new MAF, though I don't know if you could do more than 250whp like that. I've only heard of a stock MAF doing around 180whp under 5v.

2000 Rio Red I4 Cougar 200whp & 210wtq at 9psi 254whp & 276wtq with NX 35shot WRX TD04 Turbo, Cut Short Shifter, Strut Tower Bar, 17" ZN Wheels, Roush Springs, Starion Intercooler, NX 35 shot, HKS SS BOV, Full 3" exhaust,StreetFlight Chip