An inflatable restraint assembly includes a vehicle pillar and a pillar trim component that is attached to the vehicle pillar, with the pillar trim component having an upper end. A curtain airbag module having an inflatable curtain portion is disposed in a stowed configuration prior to deployment and moves to a deployed configuration subsequent to deployment. A guide ramp is disposed between the inflatable curtain portion of the curtain airbag module and the upper end of the pillar trim component. A headliner having an outboard portion is sandwiched between the guide ramp and the upper end of the pillar trim component prior to deployment of the inflatable curtain portion of the curtain airbag module. The outboard portion of the headliner defines a reduced thickness section.