Flow Test Comparision - Clean Head Vs Dirty Head

Which flows better and how much ?

  • Dirty Head Flows Significantly More

  • Dirty Head Flows Slightly More

  • Both heads flow essentially the same

  • Clean head flows Slightly More

  • Clean head flows Significantly More

Results are only viewable after voting.


The Grumpy Grease Monkey mechanical engineer.
Staff member


"One test is worth a thousand expert opinions."
OMG, that video, that guy sure does like to talk.
18 minutes of talking to say what could have been said in 3 sentences.