This is an OEM GM replacement gasket for the intercooler end plate to intercooler case on the LF3/LF4 engine. End plate requires 2 total. 

Fits: 2016-2019 Cadillac ATS-V, 2014-2019 Cadillac CTS V-Sport, 2013-2019 Cadillac XTS V-Sport, 2022-2025 Cadillac CT4 V-Blackwing, LF3 engines, and LF4 engines