This video features a 670HP modified 9ff Porsche 997 Turbo RSR equipped with Capristo exhaust system doing some head to head races against other cars! Liked the video? Click the 'like' button, comment, and subscribe! Follow me: Subscribe: http://www.YouTube.com/GUMBAL FACEBOOK: http://www.fb.com/GUMBALTV INSTAGRAM: http://www.instagram.com/GUMBALTV TWITTER: http://Twitter.com/GUMBALTV http://www.gumbal.tv