Combined with new settings on the two engine controllers from Magneti Marelli, in charge of the ignition, the fuel injection and the turbo boost management, allowed the power to increase to at 6,250 rpm with a specific output of 142 hp/L. The torque is at 4,250 rpm. This engine was given the designation "AM 490" in the Maserati engine reference book. The engine was made compatible with lead-free gasoline. Induction consists of two IHI water-cooled turbochargers with two air-to-air intercoolers. Changes from the 2.24v's engine include a new, lighter crankshaft, new exhaust valves (sodium filled for improved heat dissipation), new combustion chambers, new lighter connecting rods, new lighter forged aluminium pistons, and new IHI turbochargers.