I just pulled out my dyno run fromn May/2000 when I compared stock filter and stock MAF versus KKM filter and 73mm MAF... got an average of 3.2 HP and 3.4 TQ and at the max 6.8 HP and 6.2 TQ. I don't, however, know how much was attributable to the KKM and how much to the MAF. I do recall a pick up in TQ that I noticed when going up hills and in general driving. E-mail me (check my sig) if you want the dyno #'s on an Excel spreadsheet (I guess I can scan the dyno sheet too if ya want).
Black 98.5 SVT w/ KKM intake, 73mm MAF, ASP pulley, Optimized stock Y-Pipe, 24mm hollow rear sway bar, Magnaflow resonator, Magnaflow mufflers, Roush springs, KYB struts
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) that you can directly attribute to the MAF- or was it one part of a bunch of simultaneous mods?