Billet Valve Cover O-Ring Oil Fill
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To install this item, you must make a 1-7/16" hole in the valve cover. You may want to purchase 91011033, our billet breather and/or 91011034, our billet PCV valve.
NotesIt may be necessary to chamfer the barb on the billet breathers we offer when used in conjunction with this oil fill adaptor. The barb on the end of the breather is squared off and is a very tight fit into the oil fill hole o-rings.
Base of oil fill hole that will be positioned into the inside of the valve cover is 0.5" thick. The o-ring is 0.185" thick. Please check for valve train clearance prior to installation.
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