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Holley 1904, 1920 Diaphragm Spring - 66-435
Holley 1904, 1920 Diaphragm Spring - 66-435

Holley 1904, 1920 Diaphragm Spring - 66-435

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Your Price: $3.95
Part Number: 66-435
Availability: In Stock
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Holley 1904, 1 barrel accelerator pump diaphragm spring. This is the conical spring that goes behind the pump diaphragm. See #37 in the illustration.

This spring is critical to having a good accelerator pump action. Without it you will get a hesitation when stepping on the gas.

We have these springs custom made here in the US.

1904 Diaphragm Spring

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