I just installed a bassani muffler system on my 01'L. Why is it that we lose a small amount of horsepower with installing a cat-back. My truck is louder than hell so i know the flow is there. Does the Borla system lose horsepower because it is a single muffler? Is the stock muffler just that good? It's strange because on most vehicles a cat-back would add from 5-20 horses. Jdm makes the silver bullet system but does it lose power also as the only mod? Is the silver b as loud as a bassani cat- back because there is no way flow is a problem with either?:shrug: