Grunt Valve


a vehicle that has been modified so that it produces a loud, rumbling, aggressive noise when the engine is revved. this modification is known as installing a ‘grunt valve’
dave: bruv, what was that car that just sped past us, sounded like a tvr or something..?

joe: nah mate, saxo.

dave: sh-t man, must have a fat grunt valve innit.

dave: what you sayin joe?

joe just chillin in the grunt valve innit.

dave: fair play, whats the grunt valve sayin?

grunt valve: ggrrrrrrr – waaaap waaaapp waaaaaaaaaaaap!

dave: that’s some serious grunt valve right there joe, he is on it.

joe: innit doe.

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