Made in the USA SPEEDWERX always has performance on their minds. Their mufflers will either perform same as or better than the stock system Designed to utilize the stock outlet location and require no major chassis modifications for installation Ceramic coated and most mufflers come with installation instructions if needed Cut anywhere from 3 to 12 pounds depending on model Designed to reduce weight while keeping sound levels as low as possible. More bark than stock units but to not be too obnoxious. In other words, they wont blow you off of your seat Some models are even quieter than stock. 10-17 800 mufflers are 4-6 decibels quieter than OEM @ 4000 RPM