Free/ Inexpensive Mods:
Remove Air Silencer
K&N Filter
You cannot manually adjust the timing on a 4.6 like you can a 5.0. (Unless you want to invest in a Steeda Timing Adjuster)
Best first mods for the 4.6 in my opinion are:
1. Gears (I'm currently running 3.73s and love them)
2. Pullies
AND
3. An after market short-throw shifter
(You never want to miss a gear while frying rice ;-)
Cat-Back exhaust is also good for a great sound, but you won't see much of a performance difference until you up the horsepower a bit more. If you continue into more serious mods and hit around 300 hp, consider headers and an H or X pipe with your cat-backs.
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98 GT
Dyno-Max cat-back exhaust, 3.73 gears, Steeda shifter, Ford Motorsport Underdrive pullies, 87mm MAF and Roush cold air kit...
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