Fel‑Pro valve cover gasket set 1691‑1 uses a composite material laminated over a steel core to deliver maximum compression and torque retention in super‑high‑vacuum conditions. Intended for competitive applications such as Pro Stock, Top Fuel, and Funny Car, this gasket is not intended for use in emission‑controlled vehicles. The design reflects an application‑specific approach for demanding sealing environments.
Fel-Pro 1691-1 Engine Valve Cover Gasket Set