*** IN STOCK SHIPS TODAY *** Over time the hex will get rounded off on the oil filter cap making taking the oil filter apart to check out or clean more of a chore than it needs to be. RBS carries a full line of parts to keep your System 1 HP-6 oil filter in tip top shape.
Cap is 4.250" in diameter, anodized alum. finish, 13/16" hex to make removing or installing the cap a breeze. Cap has been pocket milled on the inside to make the part light to help keep the weight down on the hot rod.
Fits all 4.00" diameter System 1 oil filters.