Headers ?
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Headers ?
I just recently installed kooks headers and catted y pipe I got the headers with all the emmisions junk.Now my ? someone told me I have to reduce the the size of the air pump hole were it bolts onto the headers.He said I have to put a piece of sheet metal in between with appox 3/16 size hole and sandwhich the gaskets in between,or my air check valves will go bad is this neccasry to do?