you have to hook up a handheld tuner to cut off speed limiter. Make sure you have decent tires. Eclipse GSX had no speed limiter because it came with tires rated for 160mph+. Rs GS GST came with tires good for 130's. That is why they have speed limiter. My GSX had intake, catback, fuel boost and turbo boost, maybe around 260 horse, and the fastest i got it to was 155.
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