RBS stocks durable Buna O-rings for Fuel Hemi head or Fat Hemi Head spark plug tubes. Please specify Fathead or Fuel head when ordering and O-rings are sold individual. Racer can pick head type from drop down menu.
Fuel head O-rings measure .210" thick, Fathead measure .110" thick.
RBS will be closed Nov 21st-Nov 28th, for Thanksgiving Holiday. 
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