Piper have been around for years, a friend had some of their fast road cams in his Clio Wiliams, made a hell of a difference!
I had CatCams on my old 9000, these were slightly modified by Abbott Racing, nothing mad just a mild 243 cam. Didn't really feel any benefit on the td04 and gt28rs until I fitted the gt30. Looking back I should have gone for 268's from Maptun instead.