Quote: Under the hood is a specially tuned LS1 5.7-liter V-8 aluminum-block engine currently estimated at 340 horsepower @ 5200 rpm, 360 lbs.-ft. of torque at 4000 rpm with an appropriately tuned Pontiac exhaust note. While sharing the same basic engine configuration with the base-level Chevrolet Corvette, the LS1 engine in the GTO has been modified with a high-lift camshaft and increased airflow induction to create greaterhorsepower and low-end torque than the Holden Monaro to address the needs of U.S. drivers.
