Replaced the stock muffler with this 50 series and it's perfect. I was looking for some buzz and power, but nothing that would blow my neighbors away or annoy me at highway speeds. Relatively quiet when idling. This is the ticket. Overall, my truck feels more powerful and robust. I spent $70 installing it and it's worth every penny. Highly recommended. My truck is a 2012 Toyota Tundra Crewmax V8 5.7L. It justifies the engine. LFG!