turbo 138Turbo Air 2289-138 Genuine OEM Replacement Part. OVERLOAD. Share. The link to this page has been automatically copied to your clipboard. OK. Exit. Turbo Air 2289-138 OVERLOAD.ECU Remapping for Fiat 124 Spider 1.4 MultiAir Turbo 138 bhp. Gain 51% power with a Stage 2 petrol Tuning. Chip Tuning options available, Rev limit removal.