Two bolt-on type flanges with two 3/8 N.C. threaded holes in each. One 1.00″ O.D. hose connection. One 3/8″” and one 1/4″” N.P.T. fittings. One 1.75″” hole on top for filler neck. NOTE: 1.00″” O.D. hose connection is closed when shipped. By either cutting open 1.00″” O.D. hose connection or drilling a series of 3/8″” holes in baffle