I am just wondering is it worth putting one of these on? has anyone else used one? do they damage your engine in any way? ive seen them cheaper elsewhere and for 20 quid seems reasonable even if you only get 5-10bhp?
http://www.tuningwizard.co.uk/index.php?main_page=product_info&cPath=66_152_671_676&products_id=484
http://www.tuningwizard.co.uk/index.php?main_page=product_info&cPath=66_152_671_676&products_id=484