If you search , there are alot of threads dedicated to this. You could do an Aluminm driveshaft fairly cheap.
The Screamin Deamon ignition coil and plug wires, (I recently did that, I highly reccomend it).
Under drive pulleys, but I heard they are worthless.
They do make heads and cams, the only ones I have seen were on a site called supersixmotorsports.com. To get both, you can't get the cam without new heads, its gonna cost about 2600. THen to have then put in is gonna be another 2000. So they do make them, its just expensive.
__________________ 2008 v6 Pony Package.
Performance mods: Aluminum Driveshaft, Screamin' Deamon Ignition Coil, Red Livewires... and an STS turbo kit with an intercooler,and water methanol injection.
5 psi~ 286rwhp, 331 rwtq
Other Mods: Window Louvers, 2 10" MA subs, 1200 watt RMS Hifonics amp. Tial 50mm BOV. | 
Upgrading my v6 2007 mustang 
