Yea I was going to day the design looks pretty impressive for stock. Much more RS4 style than S4 style for sure lol.
Nice catch there joe, 8 O2 sensors is no joke lol. But I guess with a V10 it’s nice to be able to split it into quarters rather than just banks for monitoring.
It’s be interesting to see a pic of them flipped over (where the exhaust flange to motor is facing down).
It kinda looks like they use a precat on 2 of the cylinders, but the rest flow straight to the second cat. So I wonder if one is considered a “precat” or if they’re both just main cats? Since the first one doesn’t technically feed the other. I thought it was mandated law in 01 or something for there to be a pre & post cat.