exhaust system vs exhaust pipe

exhaust system and exhaust pipe both are nouns.

Word	Noun	Adjective	Verb	Adverb
exhaust system	Yes	No	No	No
exhaust pipe	Yes	No	No	No

exhaust system (noun)	exhaust pipe (noun)
system consisting of the parts of an engine through which burned gases or steam are discharged	a pipe through which burned gases travel from the exhaust manifold to the muffler