The Leo carbon shield everyone is after cans with the gp pro exhaust . The exhaust has been discountinued now which is a shame as it's a work of art. Unless your very very Lucky to get one second hand off flea bay inthink this one is the only option http://bit.ly/1fm4cCu Keep your eyes out for one of these tho
You have to watch some of these Yanks that sell them, i found two on Amazon, they wanted $89 for the infill but £140 for shipping