BongoGME

Has anyone found any aftermarket anything for these engines? I'm coming up short for any 2014 A8 4.0T performance parts. Thanks everyone!

Jack88

They flow quite well, a CAI or a cat back will not benefit you. Those are for visual appeal and a change of sound only for this car. A tune is the single best bang for buck mod you can make, with downpipes being the next best modification. Anything else is just flash and noise. Probably why there isn't much else available, this car is not about flash or noise. APR seems to be the most popular way to go, but MTM is quite reputable and there are some other companies I'm sure I'm missing.

cleex024

you are probably right that there arent too many people out there that want that much noise but even more so there just isnt enough of these cars out there. it is so rare to see an a8 while s8s are just non existent.

however going back to the op milltek is one of the only options out there as far as catback systems go for this car. i would look into maybe modifying the stock system which im thinking of doing...plus dps should help with the noise thing.

anyone know if apr would pass emissions...or even throw a code? cause if they do not pass or they throw a code then why do people even go for high flow cats?