I muri i te P-38F i te tīmatanga o 1943 i te P-38G, te whakamahi i Allisons kaha ake o 1,400 hp (1,000 kW) ia, me te rite rawa ki te reo irirangi pai. i whakatakotoria he tatini o te production P-38G whakaritea ki te mahi rite tauira mo te aha e riro i te P-38J ki atu upgraded Allison V-1710F-17 engines (1,425 hp (1,063 kW) ia) i roto i booms whakahoutia i ngā intercoolers whitiki-maunga i roto i te wahi o te pūnaha taketake i roto i te mata ārahi o nga parirau, me radiators atu tōtika. subcontractors Lockheed, Heoi, i te tīmatanga i taea ki te supply o rua rārangi production Burbank o ki te nui o ngā intercoolers matua hou, me te radiators. kihai i hiahia Production Board War Planners ki te patunga, me te pupuri i tetahi o nga tauira e rua e toe ana, engari i riro i te tokorua ārahi pūkawaenga o te P-38F.
Ko te P-38G