I've been here for about 3 years. Over the past 3 years these are the things I have learned about the 4.6 L 2 Valve Mustang GT
From 99 - 2001, the proven N/A mods were: Air Filter, gears, Shorty Headers, X or H pipe, Cat Back, Timing adjuster, Larger MAF, and pulleys.
Mods that were...