Starting outside, this Chevelle retains its factory sheet metal ... the combination of which produces 620 horsepower and 650 pound-feet of torque at the wheels on seven psi of boost.

After hours: March 7 at 7:48:09 PM EST Loading Chart for HPQ ...

Redesigned intake and exhaust channels, new piston rings, optimized injection, and a new electric supercharger and exhaust gas turbocharger result in 443 horsepower and up to 443 lb-ft of torque.