Turbo bearing housing K04 1900011235H K04-0064 water cooled, as shown in the photo below;

Hammer dowel pin into turbo bearing housing

Turbo bearing housing GT GTX3076R BB

A versatile water jacket of turbo bearing housing designed for special application

Turbo bearing housing GT25R GT28R GT30R GT35R ball bearing

Every single piece of water cooling turbo bearing housing is conducted with pressure testing at Okamins