Z1 Turbo Inlet Bell for the Z1 stock Turbo. Venchuri style design makes a smooth transition from a 2 1/2″ diameter to the old sized 1 7/8″ diameter turbo inlet. Incorporates an internal O-ring and pinch clamp that fasten to the turbo inlet. We see from 6-10 hp improvement. Billet Aluminum. Anodized Red.