Identification is important as often there is a hose bead model of a charge air cooler that is similar to a flange model. * Remember the difference is how they are clamped.Hose Bead ConnectionPicture Examples Below Show Typical Hose Bead Connections:Most common connection type for charge air coolersSilicone rubber hose slides over connection, then clampedTypically has smooth round bead in from the connection end Flanged ConnectionPicture Examples Below Show Typical Flanged Connections:Less common than the hose bead typeFlanged connections are used with a mating flange air intake hose or tubeFlange to Flange connections connect with a v-type clamp that pulls the two metal flanges togetherFlanged connection types are not interchangeable with hose bead models