Comparison : Item # HDET-4710, SERIES 40; Turbo
Item # HDET-4980, SERIES 50; Manifold
Item # HDET-4981, SERIES 50; Turbo (1/2" ins)
Item # HDET-4985, SERIES 50; Turbo (1" ins)
Item # HDET-5160, SERIES 60 High Mount; Manifold 3pcs