This is an NOS Oil filter bypass valve for 1956-67 Corvettes.  Used with canister style filters

NOS bypass valve in AC box - box is not sealed

GM# 5573979

NOS parts - I will not warranty a 50 year old original GM part.  NO returns on an NOS part that fails to function, is installed or used in any way.

Flat shipping of $9 within 48 states - this includes insurance - all others pay actual shipping