Just bought some Flowtech Headers from Jegs for my 89 surban ($96 delivered!) The driver side exhaust manifold has the 02 sensor mounted in it. Where should I weld in a o2 sensor bung for proper placement and function. SHould I tap into the header itself down by the collector? Into one of the header tubes? Or can I place it into the tubing after the header? Or does it really matter at all, as long as its there?
Thanks tekguy