By belt

By gear

By inlet gas

By exhaust gas

Muffler

Oil filter

Air filter

Fuel filter

Cloth

Paper

Strainer

Wire mesh

To reduce the heat

To reduce the noise

To reduce the vibration

To filter the exhaust gases

Between exhaust pipe and tail pipe

Between tail pipe and exhaust manifold

Between engine head and exhaust manifold

Between exhaust pipe and exhaust manifold