Increase your horsepower and torque with this hand-welded muffler for 912 models. The Steelpak is offered for those who want a quieter muffler. It has the familiar low and throaty Bursch sound due to less back pressure. Each one is painted gloss black and has polished chrome exhaust tip(s). This muffler does come with a flange that is used in order to be removed from the car. Only hand tools needed for installation. This muffler will be louder than a stock muffler.