Proform 66197 Locking Ford C6 w/ Big Block Trans Dipstick

This Locking Transmission Dipstick Kit is designed to provide a secure, upgraded dipstick solution for Ford C6 transmissions used with Big Block V8 engines. The locking cap helps keep the dipstick firmly seated under pressure, while the durable black finish adds a clean, finished look to the engine bay. Precision computer-modeled for proper fitment, the kit includes both the dipstick and tube and is constructed from high-quality steel for dependable performance in both street and race applications.

And also....because NHRA says so.