these all system on your vehicle gets rid of harmful gases that could damage the engine it also bring up the gas is a bit before bending them into the air properly functioning saw system does not a big job muscling the airborne noise of the engine last our dearest thank them. it's a system of metal tubes in place we only same to notice when it's breaks down
and then mufflers importance is loudly driven home to make an exhaust system and the chemical pollutants are sustain the steel strips up into punch press shuffling it back and forth allow for precise cut with little waste