Frontal airbag systems

An inflatable airbag system can be configured to be mounted to a frontal region of a vehicle. The inflatable airbag system includes a housing configured to be mounted on a steering wheel of a vehicle and an inflator assembly at least partially disposed within the housing. The inflatable airbag system includes an airbag that receives inflation gas from the inflator assembly to expand and deploy out of the housing from a packaged configuration to a deployed configuration to provide occupant crash protection during a collision event, the airbag defining an inflatable chamber. A diffuser is disposed within the inflatable chamber and is in fluid communication with the inflator assembly. An occupant-facing panel of the diffuser comprises an aperture disposed in the center of the occupant-facing panel of the diffuser.