This might just be with the Mitsubishi and Nissan cars but every single Evo and Skyline reads that they have 276BHP, but when you get them in your garage they shoot up. I have recently bought a Evo 7 GSR and it read 276 in the shop but in the garage it read 371 (I think cannot remember), is this just my disc thats screwed (after all it is over 3 years old) or is it a known bug??