Looking for correct cap for Smog delete

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Apr 14, 2026 | 09:10 AM

NuToVettes

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Joined: Jan 2024

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From: New Hampshire

Looking for correct cap for Smog delete

I am trying to find the correct cap to plug the secondary AIR injection system at the exhaust manifolds where the check valves thread into.

Fitting I’m trying to cap off circled in Red.

1989 Corvette L98

Apr 14, 2026 | 01:35 PM

typical boomer

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From: Marysville WA

Looks like you got your answer on one of the FB forums. 1/2" npt plumbing cap.

Apr 14, 2026 | 04:54 PM

NuToVettes

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From: New Hampshire

Quote:

Originally Posted by typical boomer

Looks like you got your answer on one of the FB forums. 1/2" npt plumbing cap.

I did. Thanks!

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