what is extrude honing?

A thick abrasive substance is forced over and over through the port of heads or an intake to open them up.

Liquid Porting ........ Kinda Sorta :D

You don't get to pick and choose which part of the port does or does not get removed with this method :(

Grady
 
One company I spoke with wanted $700 do do my cobra intake. I said forget it, I can buy a better after market intake and save some dough in the process. I don't think they are all that expensive, but that was rediculous!