Developed in conjunction with Chris Rivas to develop the right system to address M-Eight big motor builds. Features equal-length stepped headpipes from 1-3/4″ into 2″ and then 2-1/8″. 4″ muffler housing has 3″ louvered removable baffle. Includes full heat shields, billet end cap, 18 mm O2 bung and 12 mm adapters. Recommended for bikes with motor builds above 140 horsepower.