'C' section steel gasket for installation between the bearing housing/CHRA and the turbine housing. Various sizes so please check which is correct. (GTB22 are the largest).
If you need a complete repair kit check out the Rebuild Kits section.
Please measure your existing gasket carefully as not all GTB20s use the 133mm diameter gasket. 802774 GTB2060VKLR uses the 136mm