I have been doing some research on exhuast systems. I am stuck between a rock and a hard place (the X would get me out...lol). I am interested in a Gibson Cat Back exhaust and a Calmini. Gibson is rated at 10-15 hp gain/26 ft lbs of torque, however, Calmini does not show a rating. I am seeking some advise to which one would be worth my money. Thanks. Scott

If the most important thing to you is an increase in performance get a custom dual system done at your local muffler shop. I recommend dual flowmasters from experience. I would make sure if you go that way to get a good intake to make sure you bring in enough air to take advantage of the reduction in backpressure.