AP Exhaust Exhaust Muffler Assembly P/N:40148

Quiet the roar and route exhaust gases smoothly out the tailpipe with the AP Exhaust Exhaust Muffler Assembly (MPN 40148). It installs as a direct-fit replacement for the 2010-2013 Mazda 3 with the L4-2.0L engine, restoring the exhaust system's ability to dampen combustion noise as the gases leave the engine.

• Aluminized steel construction: the muffler is built from aluminized steel for corrosion resistance.
• Direct-fit application: designed to replace the original muffler on the listed Mazda 3 application.
• Made in the USA: country of origin is the United States.

A muffler uses internal chambers and baffles to attenuate the sound pulses created by the engine's exhaust while letting the gases pass through to the tailpipe. Over time, road salt, moisture and heat cycling can rust the shell or perforate the internals, which shows up as louder exhaust, a rattle from loose baffles, or an exhaust leak. If a failed muffler is the cause of those symptoms, this assembly replaces it. Inspect the connecting pipes, clamps and hangers while the muffler is out and replace any that are worn. Made in the United States.