I own a 2005 honda civic ex special edition with auto transmission i want to install headers exhaust and air intake i just dont know were too start at i really dont know that much about auto tuning.i was wondering whats the best brands of headers exhaust etc too get on my civic too make it sound loud and raw also it has a vtech engine i really dont know if its stock or not does having a vtech give you more horsepower or no im also thinking of adding some horsepower any tips ??????