In one embodiment, an implantable pulse generator for electrically stimulating a patient comprises: a metallic housing enclosing pulse generating circuitry a header mechanically coupled to the metallic housing, the header adapted to seal terminals of one or more stimulation leads within the header and to provide electrical connections for the terminals the header comprising an inner compliant component for holding a plurality of electrical connectors, the plurality of electrical connectors electrically coupled to the pulse generating circuitry through feedthrough conductors, wherein the plurality of electrical connectors are held in place in recesses within the compliant inner component, the header further comprising an outer shield component adapted to resist punctures, the outer shield component fitting over at least a portion of the inner compliant component.
