I missed that part in your post...well, it looks like this flywheel goes to my TII and not the NA. It's still a good deal but I am not sure I'm gonna spend more money to get a new NA flywheel. The stocker will go back into it.

It makes just as big of a difference if not a little more on an n/a car. I've heard multiple reports of RX8's picking up 9 rwhp on the dyno with a lightweight flywheel. That's over 5%. Not bad at all. Not to mention quicker revving when downshifting etc. I'd do it for sure.

The guy I always turn to when it comes to flywheel questions is Jeff20b. You might want to consider shooting him a PM to run your plan by him, although I'm not sure if he's on this forum or not...

DO IT

less rotating mass more faster revs!

I'm about ready to buy titanium flywheel nut and ti front pulley bolt.