LOL :rofl: Thats a contradiction if I have ever heard one!
Since they are already blown, why not remove them and check with a ruler?
I dont advise it. The OEM speakers are 2ohm. Your Infinitys are most likely 4ohm. You would not damage anything by using them but the power output of the stock amp would be cut in half and its already weak as shit. You'll want an aftermarket amp if you end up using aftermarket speakers, in my opinion.