Hot to get more HP for free (Holden/Opel Astra)

http://www.youtube.com/v/sf1RQnKIJjg?version=3&f=videos&app=youtube_gdata I briefly go through what I have done to get more HP out of my x18xe engine and share it to you as it cost me nothing to do.

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Hot to get more HP for free (Holden/Opel Astra)