Ce n'est sûrement pas le même, il est plus grand sur la OPC. C'est parmi les quelques modifs entre le 2l turbo classique et l'opc.
Compared to the 147 kW/200 hp version of the 2.0-liter ECOTEC engine, the OPC engine features a number of significant modifications, including oil-spray cooling and modified rings for the aluminum-silicon forged pistons, a pressure-optimized turbocharger, an intercooler with increased flow rate as well as larger fuel injection nozzles. A reduction of the engine rotating mass is achieved through elimination of the balance shafts, significantly contributing to the engine's liveliness and responsiveness.