Here's another article for v6 modifications:
V6 Mustang Modification Guide
Just some advice based on past experience...I'd stay away from RPM Outlet. They are notorious for messing up orders, taking forever to ship products, etc. I had issues a few years ago, but I highly doubt they got their **** together...I'd stick to site sponsors.
VMP Tuning, Bamachips and Brenspeed are great for custom tuning if that's what you want to do.
12 Black GT500 SVT PP l 2.6 Pulley/Idler l Airaid l o/r X l 305 NT555R's l Recaros l
04 Azure Blue Mach 1 / 03 Sonic Blue 3.8 / 14 Sterling Grey F150 FX4 402A 5.0 / 11 GT500 R.I.P.