Purchased an 06 C6 convertible off the showroom floor. Bolt-ons got it to 440 hp.
Loved the car but wanted more car/driver involvement. Unfortunately the vette was an automatic.
My 12 370 6mt with FI CBE is perfect for what I wanted. However, a Z06 might be another story.....
http://www.the370z.com/images/smilies/tiphat.gif