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Replacement Air Injection Check Valve Threads?

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Old 06-13-2017, 10:33 AM
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Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Replacement Air Injection Check Valve Threads?
So I bunged up my check valve threads on one of my headers. Does anyone know the thread? I suspect it is pipe thread. I am planning on getting a section of pipe nipple and having the end welded on for new threads.
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Old 06-13-2017, 11:56 AM
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Car: 1967 Camaro, 91 z28
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Re: Replacement Air Injection Check Valve Threads?
Iirc 3/4 npt
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Old 06-16-2017, 01:41 AM
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Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Re: Replacement Air Injection Check Valve Threads?
Thanks. It's 1/2" npt on my header manifold. Got a black steel female face bushing and had it welded onto the 3/4" air injections manifold tubing. Looks solid.
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