I recently bought an aging Flowmaster 40 series as a replacement, which I installed on my Dodge Ram. I heard they flowed better and had a smoother sound. Well I installed it and it met my expectations. It doesn't buzz like the Flowmaster and has a smoother sound. But when you're cruising down the freeway or passing a random Sunday driver, it sounds really nice. So if you want a nice sound that isn't uncomfortable and has a certain quality then go for it. It has a nice rumble and seems to have a bit more responsiveness too, but that could just be a placebo effect.