ARC Stock length billet rod with bearing inserts for the Briggs Flathead 5HP Engine 3.875" center-to-center. Uses Bearing inserts. Has ARC's exclusive forced oiling scoop dipper. For use with the stock crankshaft and stock piston in "stocker" WKA, IKF, AKRA type flathead 5 HP kart engines. This has been our most popular rod for many years. Includes bolts and bearings.