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Head Supply Port Fitting Assy.
The fitting that goes into the head wrench size is 15/16”. Recommend using teflon thread sealant on npt threads of fitting that goes into head. (This fitting replaces OEM plug that is located between on aft, top, passenger side of head between cylinders 5 & 6.)
Next is the 90* elbow requries a 1” wrench and a 7/8” backing wrench. The JIC 12 adapter requires a 1 1/8” wrench. Pushlock fittings require 1 ¼ wrench.
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