I removed the mufflers, and the chamber. Only running the first section of exhaust straight from the motor. I only did this because I´m putting the motor in a different frame and I´m not using the factory mufflers. I´ll tell you it´s really, really loud. You don´t want just straight pipes, too loud, and really just doesn´t sound right. You´ll want some type of baffle at least. I´ve not decided what I´m using yet either...hmmmm?