A tanks inc 450 pump module is $340. That will support your hp goal.
+ some kind of regulator (~$150), you are about $500 in ignoring plumbing which will be needed for either option.
Vaporworx module is $430, which just controls the pump.
Not sure what CTS-V fuel pump module assemblies are going for. OEM modules look to be ~$800, aftermarket about the same.
The Tanks Inc tank won't accept an OE style module so you will need to weld in the mounting ring, ~$200 in hardware + installation.
So now you're ~$1500 in. (unless I'm misinterpreting the Vaporworx site)
There is no arguing that the Vaporworx setup is better. Really depends on your intentions with the car as to whether its worth it.
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