Evo 4 – 6 Evo 7- 9 and EVO X replacement transfer case gearsets for Your Evolution. Made with the Klingenberg Hypoid Spiral pattern for a stronger volute profile over traditional flat Gleason tooth profile. Offered in 2 different materials Forged for applications up to 800 hp and Billet for applications up to 1500hp. Also available with special wear resistant Lafer superfinish. Manufactured and designed in Italy by Brena Corse.