The o-rings in this section are exact replacements for Trans-Dapt Performance Products' O-ring style Water Necks. Each package includes three o-rings.
 
Part # ProductTube DiameterEngineBolt Hole Quantity Media
6012 Replacement O-rings for ALUMINUM Waternecks
Photo
$1.64
9243 Replacement O-rings for CHROME Waternecks 2
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$2.21
9416 Replacement O-rings for Waterneck #9415 2
$2.63
9441 Replacement O-rings for Waterneck #9440 2
$3.86
 
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http://hedman.com/images/ePIM/original/9243.jpg