Oil Pump Access Cover Gasket. Fits 90~95 ZR-1 LT5. 1 gasket required.
Gasket made from Pro-Formance/MicroPore, non-asbestos gasket material with a fully cured nitrile butadiene rubber binder, 12~20% compressibility for excellent sealability and a max temp rating of 550F.
See part #422 in the diagram.