As others have stated, the speed limiter was dependent on the type of tires your Camaro originally came with. Cars with the GSC or RSA Goodyears came with a 162 mph limiter since the tires were Z-rated. The non-Z rated tires had a limiter at 120 mph.

How exactly does it suck *** that GM makes a car that is limited to the safe speed at which you could drive it stock? I think letting the car get up over 120 and having the tires disintegrate and all of the consequences of that would suck *** much more.