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Bullfrog Performance Products Valve Spring Kit, Single Honda GX390 40 lbs.

Product Description

Valve spring kit for Honda GX390 engines.  This is a set of single wound valve springs rated at 40 lbs. @ 1.200".

Spring Height to spring force specs (these are approximate spring force specs and could very 5%)

1.200" = 40 lbs.

1.100" = 50 lbs.

1.000" = 60 lbs.

.900" = 70 lbs.

.800" = 85 lbs.

.700" = 95 lbs.

.600" = 110 lbs.  Coil bind occurs at .600" spring height

$18.95
Maximum quantity available reached.

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