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Crown Automotive heat riser valves can replace those which become seized or corroded to the point that they no longer operate. They are important emissions devices whose purpose is to heat the manifold on cold start-up by redirecting exhaust gas through the intake manifold. Get these simple Crown devices and restore smooth engine idle.
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$67.99
$61.19
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Crown Automotive exhaust check valves prevent exhaust from forcing its way back through the air injection system, which would damage the pump and other components. If your original parts are bad, they will be unable to sense the increase in the intake manifold vacuum and may cause damage to the cylinder head, pistons, and cylinder bores.
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$27.99
$25.19
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