Base Mustang V6 with Destination $20445
Loaded Out $24875 +$4430
BUT that includes a bunch of crap.
Front end cover
full car cover
Mobile-Ease Cell phone system
Power Code remote start system
SplashGuards
TripTunes - Ipod connection

All weather floor mats
Cargo Net
Take those off and MSRP drops to $23005 +$2560
GT Premium $28215
+ Every Cost Option with the Cali pkg (Bullitt is more restrictive on options) $35970 +$7755
Remove:
GT Appearance
Comfort
Interior Upgrade
TripTunes - Ipod connection

All weather floor mats
Cargo Net
Sirius
Ambient Lighting
Metallic Fuel Cap
Mobile-Ease Cell phone system
MSRP $33305 +$5090 in Options
Its hard to say what options will be available at any given level. We don't have definitive information on what engine,axle, interiors or trim levels will yet be available. Usually higher level trims will have leather standard. (G8 GT) It may be that there is an SS pkg. and it already has 2.75" dual Exhaust and a 3.73 rear axle standard. There may not be any optional exhaust or axle or any need depending on the Trim selections. Untill we know more $3k is a reasonable avg markup to play with.