Just purchased a 2010 Grand Sport with 5k miles. Does not have the NPP exhaust option. Would like to add improved performance air intake and exhaust system. What is suggested and do these modifications require the engine to be re-tuned ???
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Just purchased a 2010 Grand Sport with 5k miles. Does not have the NPP exhaust option. Would like to add improved performance air intake and exhaust system. What is suggested and do these modifications require the engine to be re-tuned ???