I was wondering if anybody has got the Diamond Eye upper downpipe with the oxygen sensor port to hook up the coupler for the egt gauge and where is the port location on the downpipe? Because I am not a big fan of drilling a hole into my manifold.

 

That port is for an egt sensor. Before i knew any better, I had my sensor there. In my opinion, put it in the manifold,or don't put it in...not a big deal.

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Drill it and tap it...very easy.