If you’re looking at replacing your mufflers, there are several things to consider. Aftermarket mufflers alone aren’t enough to significantly increase your performance, but you’ll still want to make sure you choose the right product for you. Weight reduction can help increase performance, so sometimes just a lighter weight product will be better. However, look at the design and make sure it’s engineered to increase airflow. MagnaFlow Mufflers are some of the best, but Flowmaster is also very good. You’ll never find anything quite as good as open exhaust, but you also can’t get away with that in all places either.