Check Valve: 82-92 Air pipe (GM)
The engines still equipped with them usually take 3, one on each of the pipes coming from the exhaust manifolds and one more as a collector before the air injection Check Valve.

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$90.99
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The engines still equipped with them usually take 3, one on each of the pipes coming from the exhaust manifolds and one more as a collector before the air injection Check Valve.
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