all i know is they are 67cc heads.

 

I guess you'd have to know what a flowbench does to know why.

 

oh please explain to me master.

 

I wasnt being condescending. Do what I suggested above and you'd know the answer to your question. Im not here to type out a novel to explain how this works to you.

 

I already know how it works. if he is using it this way before and after he ports the head then the cfm gain is going to be the same. if he is using that to make it look like it flows more than it actually does then that is fucked up i agree

 

ok first off they were never flowed.the machine shop cc the heads and they used 3 diffrent spark plugs which i have listed in this post.the head shop they are a 67cc head im not sure why people are still going on about this.something tells me that if 2 shops came up with the same cc then they are infact a 67cc head