Ka24de wouldn't rev passed 5k rpms

[TwoForties]

Hey guys, sometimes when I try to rev the engine out, it won't rev passed 5k rpms. If I turn off the car and try again, sometimes it temporarily solves the problem. When it hits 5k rpms it bounces off like a rev limiter. What do you think this could be?

[TwoForties]

After doing some more research, so far I believe that one of these could be the issue:
-Bad distributor?
-Dirty MAF?
-Bad exhaust air flow?
-Bad knock sensor?
What do you guys think?

[CostFree]

Isn't there a rev limiter in all/most cars?