People had to wait another seven months before the commercial launch. When it finally came, they discovered a car equipped with the inline-six, 3.2-liter S54 engine with 343hp and 269lb-ft of torque. The S54 engine, International Engine of the Year for 2001, was the final and most powerful evolution of the M50 engine line. It incorporated individual throttle bodies, a drive-by-wire throttle control, and variable valve timing (VANOS) for both intake and exhaust camshafts. The engine block was made from grey cast iron rather than aluminum for greater rigidity. It had reinforced forged steel connecting rods, graphite coated cast aluminum pistons and a forged steel crankshaft.