A guide apparatus for a turbocharger, the guide apparatus comprising: an upper vane ring, wherein the upper vane ring includes a shoulder extending radially outward therefrom; a lower vane ring offset axially from the upper vane ring; a plurality of vanes disposed between and pivotally coupled to the upper vane ring and the lower vane ring; an adjustment ring including a plurality of apertures, the adjustment ring in mechanical association with the plurality of vanes; and a plurality of vane levers coupled to the plurality of vanes, the plurality of vane levers received correspondingly by the plurality of apertures, wherein each vane lever of the plurality of vane levers comprises: a base including a bore disposed therethrough; an arm extending from the base, the arm receivable in an aperture of the plurality of apertures of the adjustment ring; and a protuberance extending from the base and being disposed on the base between the arm and the bore, wherein the guide apparatus includes a lever clearance between the adjustment ring and each protuberance of the plurality of vane levers and a ring clearance between the adjustment ring and the shoulder of the upper vane ring; characterized by: the protuberance facing the adjustment ring, the protuberance being contactable with the adjustment ring and capable of limiting axial movement of the adjustment ring, the protuberance of each vane lever of the plurality of vane levers rotating along with the adjustment ring, and the protuberance being arranged parallel to and spaced apart from the arm; wherein an outer circumference of the adjustment ring is arranged radially outward of the upper vane ring. an upper vane ring, wherein the upper vane ring includes a shoulder extending radially outward therefrom; a lower vane ring offset axially from the upper vane ring; a plurality of vanes disposed between and pivotally coupled to the upper vane ring and the lower vane ring; an adjustment ring including a plurality of apertures, the adjustment ring in mechanical association with the plurality of vanes; and a plurality of vane levers coupled to the plurality of vanes, the plurality of vane levers received correspondingly by the plurality of apertures, wherein each vane lever of the plurality of vane levers comprises: a base including a bore disposed therethrough; an arm extending from the base, the arm receivable in an aperture of the plurality of apertures of the adjustment ring; and a protuberance extending from the base and being disposed on the base between the arm and the bore, wherein the guide apparatus includes a lever clearance between the adjustment ring and each protuberance of the plurality of vane levers and a ring clearance between the adjustment ring and the shoulder of the upper vane ring; characterized by: the protuberance facing the adjustment ring, the protuberance being contactable with the adjustment ring and capable of limiting axial movement of the adjustment ring, the protuberance of each vane lever of the plurality of vane levers rotating along with the adjustment ring, and the protuberance being arranged parallel to and spaced apart from the arm; wherein an outer circumference of the adjustment ring is arranged radially outward of the upper vane ring. a base including a bore disposed therethrough; an arm extending from the base, the arm receivable in an aperture of the plurality of apertures of the adjustment ring; and a protuberance extending from the base and being disposed on the base between the arm and the bore, wherein the guide apparatus includes a lever clearance between the adjustment ring and each protuberance of the plurality of vane levers and a ring clearance between the adjustment ring and the shoulder of the upper vane ring; characterized by: the protuberance facing the adjustment ring, the protuberance being contactable with the adjustment ring and capable of limiting axial movement of the adjustment ring, the protuberance of each vane lever of the plurality of vane levers rotating along with the adjustment ring, and the protuberance being arranged parallel to and spaced apart from the arm; wherein an outer circumference of the adjustment ring is arranged radially outward of the upper vane ring. the protuberance facing the adjustment ring, the protuberance being contactable with the adjustment ring and capable of limiting axial movement of the adjustment ring, the protuberance of each vane lever of the plurality of vane levers rotating along with the adjustment ring, and the protuberance being arranged parallel to and spaced apart from the arm; wherein an outer circumference of the adjustment ring is arranged radially outward of the upper vane ring.