So much good info and food for thought here. Also liked the article..I will further explore. I think it might be time to start exhaust tuning a little for extra power as I have exhausted a lot of other tuning options. But I don't want it to sound annoyingly loud in the roadster which I always liked the new sports cars that have s switch to make the exhaust sound more of less sporty depending on what you are doing or where you are driving.