2002 SS SLP Camaro with dual exhaust in the center of the car. on 2002 Chevrolet Camaro

Do all 2002 SS SLP Camaro's with center dual exhaust have 345 HP or just certain cars? Are there other SS SLP Camaro years that have 345 HP? Thinking about buying SLP Camaro. Is the 345 HP worth looking for instead of 325 HP?