Hi guys I am newbie here so first of all I would like to say Hello! I just bought 2003 crossfire roadster 48.000 miles and I love it

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I am thinking of doing an engine remapping , but would like to know what do you thing? Is it worth it? Been told it will give more 20 hp and help with petrol consumption.cost £200! Please help me as I am not sure if it's worth it!!!
Many thanks Greg