63-65 Corvette 3828373 Chrome Oil Fill Tube CAP C2 HAS ROUND CORK DISK INSIDE. for the higher perf Corvettes Chrome is "flash" not as nice as a repro. However, Orig. Looking $20 plus postage from 48446 SCREW ON TO Oil Filler Tube , NOT SLIP ON... THANKS FOR LOOKING SEE OTHER ITEMS From my NOS inventory.