Product worked well, sounded great, especially around 4000 RPM. I didn't like the air filter though it was foam, and the rubber surround broke within 3000 miles. Recommend replacing the filter with something better. Also was not impressed with Perrin customer service when it broke. They said I over tightened it however after cleaning I tightened it only to the point that it stopped falling off. I have not had this problem with any other brand of filter in my lifetime.