How do you silence a loud exhaust noise?

Answer 1

Silencing a Loud ExhaustExhaust systems are very resistant to temporary fixes due to their heat and locale. If there is a hole in the exhaust have it patched or replaced, If the muffler no longer quiets the engine Replace it, If your header is leaking Get a new gasket and install it, Nothing else will work for more than a short time. An exhaust leak is an automatic fail on emissions testing, and carbon monoxide from the leak is dangerous. When replacing mufflers use the oem model they are quiet enough, aftermarket silencers cause excessive back pressure ( more than the muffler and Cat converter are already giving you) and will hurt performance and gas mileage.