Bought new last year. Had on 11 m8. One stinger for 0-5000ft and one for 5000ft+. Will need a power commander or some type of fuel controller. Have multiple high and low elevation maps. Including a racin station high elevation map. Ceramic coating on pipe isn't in best shape. Had pipe wrapped with header wrap. Pipe also has o2 bung welded in. Close to $700 new, will ship for $350.