Wow factor

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What it sounds like you want is a C6 Z06 with the Z07 package.

You get the 450whp a turbo Z on a street tune would have.
You get the CF kit you want.
You get the 19/20" rims with good rubber.

It also comes with a 100K mile drive line warranty, resale value, and you are assured all the parts in the package will play nice togather.

To do a TT Z...

$35K for the car.
$12-15K for the kit.
$5K for a real CF body-kit and a bit of paint-matching if any is needed, etc.
$4K for rims/rubber.

You end up at $65K with no warranty and probably at least a couple of fabbed up 1-off type parts to make stuff fit that didn't fit and wasn't intended to fit from the factory.
For about $77K, you can get a 1LZ Z07/CFZ equipped Z06.

If you are going to blow $65K on a car, another 12K won't break the bank, and I guarantee the Z06 will be a helluva lot less "kit-car" ish than a 370Z with all those mods regarding reliability as a whole (has proper diff/trans/engine cooling to handle the power, has proper rear-end/transmission to handle the power, etc.)

Just playing devil's advocate, but I came on here wondering the EXACT same thing about the 370Z you did, priced all the TT kits, on and on. Bought the factory 450whp car instead.

Also, I just think the Z06 is a lot more tasteful than a kitted up Z on rims. Every time I see a thread with a kitted up Z, it seems like half the people who post about it say "Meh, not my style". With the Z06/Viper threads, about the only thing people argue is the color of the paint. Factory cars just tend to "flow" a little better. Also, this carries over into resale as well. You seem to get bored easily, keep it in mind.