We have sold a bunch of kits without the re-valving. Seems like Facebook is a better source for more reviews. Kimarie from Raptor Junkies and Chuck from Raptor Addiction have tested the system both ways. We have a bunch of videos popping up daily. Keep an eye on our Instagram page @sdiracing.thanks for your reply .
would still like a review without re-valving . im sure it way better than stock but would liek to hear a review .