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481 Posts
installed my arrow slipons onto my aprilia last week. removed the baffles and remapped. supposedly another 12hp according to 'experts' but i definitely notice about 6-8 more pull. not to mention the 'note' from those cannons. heres a sample
http://www.youtube.com/watch?v=F9glQDQqr2w
http://www.youtube.com/watch?v=H-8-UwSBtoE (shorter clip but louder)
http://www.youtube.com/watch?v=F9glQDQqr2w
http://www.youtube.com/watch?v=H-8-UwSBtoE (shorter clip but louder)