So is it worth the money to do a Gen V swap or just port the m90? Also, I may port it myself and then polish the case. While I'm at it I want to do the lim too. Eventually I want to put on a intercooler so I plan on getting the lim ready so I don't have to remove it again. I read a lot of people saying not to do the silencer fill or is it ok if done right? Thanks.