i got an OBX header for my ZC swap. i heard that they aren't that good, cuz even tho the bolt holes line up, the port holes don't? argh that sucks. can't i hollow it out some more? i was told that i could, and it would be better for that growl than the raspberry farts

thanks

 

I have never seen one so I can't give much advice, but normally a header is made of a fairly thin metal whether its stainless or whatnot. So I don't see it leaving much room for port matching without hurting its strength. You should be able to remove some though.

 

Sell it to some chump on ebay and get a real header. In the future, don't go the cheap route and buy crap for your car. Be patient, save, and by worthwhile products.