RBP has been making some gas engine exhausts... I know a couple of guys who closesly with them and another guy who is sponsored by them. As far as I know the kits are not for sale yet, but will be eventually... at least thats what I've been told.
sometimes companies wont tell you about something even if they are going to release it. i called banks a few months ago asking if they were going to release something for the 6.0 liter, and they said no. i checked last week and there it was.
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