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Discussion Starter #1 (Edited)
Has anyone been able to merge The supplied headers into a single outlet and if so how? I think it would work better for my Fast efi to get a o2 reading from the whole bank rather than just 2 cylinders. It would also make attachment of the side pipes easier. The reason I ask is that these pipes are way too loud for me and I think I need a single quieter side exhaust.
Mark D you need to come visit Maui!
 

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On a Gen1 F150 Lightning, the oem O2 sensor is in a small crossover pipe between the two exhaust pipes coming out of the cats.

Maybe you could weld something like that between the two header merge pipes.
 
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