No it doesn't with stock it only needs 2.5inch dia... And we are very old in these games hasan, you know this very well... And I'm always against overkill... Introduction of unnecessary overkill... If it is atleast pulling 300's or plus then comes the discussion of 3inch... And I've dealt many k24's but not seen any 3inch exhaust in any k24 equipped car. So i have a strong disagreement to your idea.