General Motors' Pontiac division will re-tune the 5.7-litre V8 engine in the Holden-built GTO for more power, Automotive News said. Pontiac general manager Lynn Myers told Automotive News that engineers are making two changes to the GTO's powertrain to increase low-end torque so that the sports coupe delivers better zero-to 60 mph performance and to the exhaust system to give it a more distinctive "Pontiac exhaust note".