This is what I found on a good FAQ for the 4th Gens. and also found supporting evidence. And this is why I'm confused. Either way, what's the cheapest way to raise or get rid of it? I'm taking this car to road-track track days and would be sitting on the limiter all day with it.

Q: Which cars came with the speed limiter and 115 MPH speedometer?

A: All cars that came with stock touring tires (Good Year Eagle GA 235/55R16) were speed limited to 108 MPH. In addition, they got a 115 MPH speedometer. Cars opting for the QLC package (Good Year Eagle 245/50ZR16 GS-C tires) or the QFZ package (Good Year Eagle 245/50ZR16 RS-A tires, available in 1995 and after), automatically got the 155 MPH speedometer and did NOT have a speed limiter. This is because GS-Cs and RS-As are Z-rated for speeds over 165 MPH. Any car leaving the factory with a Z-rated tires, should also have the 155 MPH speedometer and no speed limiter.



*Q: Is there a speed limiter on the LS1 cars?

A: For the cars that do not have the GS-C or RS-A tires, then they have a 123 MPH speed limiter. For the people who ordered the performance cars their speed limiters were set to 162 MPH and given the 155 MPH speedometer. There is no known way to bypass the 162 MPH speed limiter.