screw size of Vrc pipes....

[Kwakr]

does anyone know the diameter of the screw that comes with the vrc pipe???
im at work and want to get a longer screw and forgot to bring the screw with me!!! (want to hit the hobby shop on way home)
So if anyone can help, would be greatly appreciated!!!!

 

[Bigger the Better]

Not sure of the bolt usage but if they are for the exhaust attachment to the head then they will be M5's