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Old 10-26-2025, 08:46 PM   #12
Patriot Motorsports USA
 
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Drives: 2021 ZLE, C5 Z06 6.0L Procharged
Join Date: Mar 2023
Location: South Carolina
Posts: 466
Cool

There is a locking TAB on the original oil filler on the valve cover. The two parts are completely different from the mount to the cap. You can grab the base with a set of ChannelLocks and a rag, moving it with slight authority until the actual locking detent releases the mount.

I bought a much longer one from O'reilly Auto for $33 and have not mounted it on my car as I have been working on "Frosty" lately. I raised it up so I can add this -10AN oil filler cap to pull a second vapor attachment for the Air-Oil-separator and help keep oil from filling the catch cans as most of the tracks have very long right-hand sweeping turns.

See the links. There is a tab you can get to come loose then the CAP will fit perfectly aligned.

Watch this YouTube Short to do it right!
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