well what im saying is why wouldnt they just connect the straight peice to the downpipe in the first place? anyway thats all you need if you dont have that straight peice is a pipe that looks just like it with an O2 bung welded in before the cat.
welding is clean as long as its done by someone that knows what they are doing. I mean you could go talk to a muffler shop and see if they can get you a peice of pipe like that with a flange to just bolt up but you still need the O2 bung or you will just run super rich all day long.
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