A friendly word of caution here. I've used this product in the past and have ridden 4 different configurations of mufflers with them (Rinehart, WildPigs, Samson). These baffles are made to improve on the inadequacies of certain types of mufflers (i.e. drag pipes). They work very well for their intended purpose. I wouldn't recommend their use on a nice set of performance pipes. There's a good reason quality baffles are put at the far end of a performance muffler (not in the headers). If you're looking for noise volume that's a little easier to tune than running staight drag pipes then you'll be happy with Big City Thunder Baffles. After 35 years of riding, I now prefer a high performance muffler that's easier to tune and provides broad torque with high horsepower (especially on a dresser). There's alot to this topic, hope this helps a little.