I JUST put an 18G on my '02 which has 78K on it. All cars are different; different turbo plumbing and exhausts, different intercoolers and intakes etc, different octane ratings in different states, different dynos and tuners. Given my car's age and the fact that it was heavily tracked in its youth, in order to prolong drivetrain longevity, I requested a slightly more "conservative" tune of mid 290s at the wheels.