exhaust / dyno question

[Disorderlypunk]

ok im hoping there is a dyno guy here somewhere


i have seen on some bikes exhaust headers there is a bolt going direct into the exhaust downpipe per downpipe (+extra material to hold it)
i was wondering if this is something that is used during dyno runs to set up each cylinder perfectly air/fuel mixture whatever
i dont have then on mine but i know it wouldnt be hard to fit some if i find out the right thread and depth of the extra bit of steel i need
so i am just wondering if this would be beneficial to the dyno guy when i finally get it ready to do a run to get everything set up as best as possible


i would see it being benificial as it would give a reading from each cylinder and not just one probe down the exhaust
anyone know the score