This page contains Gran Turismo 3: A-Spec Hints for Playstation 2 called "Exstra HP" and has been posted or updated on Apr 16, 2007 by DickHead. Let us know what you think of this Hint by thumbs voting.
When u buy or get a new car go to GT auto and change oil, this wil boost your HP upp 10-30 and it only cost 250Cr!
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