|
Yes the TII will crush the stock rx8.
The swap only costs about 500-2000, depending on the condition the NA engine and other parts and your ability to resale them. You'll need some tools like an engine hoist (easily resold after use), jack stands, etc.
Both cars are expensive to mod. I think the TII would be cheaper, safer, and easier to mod. Many people have blown the renesis engines with the greddy turbo setup - I assume caused by bad tunes. The ECU in the RX8 is more complex (controls more systems) than the TII.
A good exhaust for a rotary powered car is going to run you $700-1000. The Racing Beat TII exhaust seems to be the choice for the TII.
| 
Hybrid Mode
