HARLEY DAVIDSON. 1 pc ARBORS. 30 DEGREE + 90 DEGREE. 2 pcs STEMS. 1X – 60 Degree Inner (Throating) Angle Cutter For Exhaust. 1X – 45 Degree Primary Base Angle Cutter For Exhaust. 1X – 30 Degree Top Angle Cutter For Exhaust.