Ok here again.... Ok heres the thing. Is the JDM flywheel differ from the usdm? And whats different? Im already going to replace all flywheel clutch. But what I want to know is that. Because starter is grinding. maybe JDM flywheel+ USDM starter not good?

no they are not different. thats not your problem it must be something else. a flywheel is a flywheel regardless of what country it is from.

If the starter is grinding its not shimmed right. Go get a new one before it destroys more!

Pull the starter and see if the bendix is shreaded or any signs or grinding. THEN check every inch of your flywheel if your having problems. there may be parts of the flyweel that are damaged.

Make sure your starter is bolted all the way down.