Anyone have a link that has aftermarket header specs for our cars? I.E. Primary tube diameter, downpipe outlet size, ect... I've searched but found nothing so far. The only company that list their specs is Comptech but the header they offer doesn't have the outlet size i'm looking for. I'm looking for a CARB Legal 4-2-1 header with a 2 1/2" outlet. If no such header exist right now, I suppose i'll get what's available but i'd still like to know what my other options are. The comptech has a 2" outlet but i need a 2 1/4" outlet at the very least. I know the DC 4-1 ITR replica has a 2 1/2" outlet but it isn't CARB legal. I don't really want to run the ITR header because used ones are about the same price as a brand new DC or Greddy since everyone thinks their shit is made from gold and a new one is like $450 and that's not including the heat shield to make it appear legal. The heat shield is like another $100.