oh btw, a company does it for the rx8, my friend just bought it and we installed them, they pretty much just add a stubby jumper wire from the coil to the harness
and hell no i would never go with the rx8 coils, everyone ive talked to said they replace coils like every 15k or less, that rediculous when you consider my FC has 200k miles on it and i still have the factory coils running strong
besides that, bangkok with the red turbo rx8 is rocking the yukon coils and i believe hes loving them, its certainly worth trying out im my opinion, after deals ill probably experiment with them...to much on my plate right now