differences in the two designs you offer and how it relates to the sound levels emitted. Also, I had no idea that your systems had such a large HP gain over exhausts like Borla. Yowsa! I guess good engineering wins again. No doubt you guys make some of the best products out there - I guess maybe I just need to get the single tip and get creative and find outlets that I like and have them welded on/swapped. Thanks for the info - very helpful.