yeah, they just fail... throws a code and starts missing - P2015 Intake Manifold Runner Position Sensor/Switch Circuit Range/ Performance Bank 1- and changing the whole unit often is the only way to fix it... VWOA replaced MANY cars manifolds as long as they were under 60k, i got lucky and the first time it happened i was at 58k, second time was at 110k on my dime.
yeah the DMK twin disc is in the car now...like 2k on it. Cant say i love it, being twin discs it seems to take a little longer to engage/disengage unless you really speed up the rate that you press clutch pedal down, pedal feel is a good bit stiffer than stock but expected. It likes to grab hard (great when romping on it and banging gears) but calm driving it takes a pretty slow clutch release on 1st and 1st to 2nd especially to be a smooth shift, and i hate the idea that I'm wearing the disc by riding it extra lol. only part i liked about the other clutch better was the pedal feel.
oh also its noisy - so when i switched it in I also had them add motul gear oil, (zero chatter unless AC was on) but removed it after break in cause i didn't like how it made the shifts feel at all went back to oem high performance oil. Shifts feel way better to me, but it did create a more noticeable chatter when the car idles under 850rpms, also its noisy at lower rpms when driving, but I blame the dogbone insert and mounts for that. i still need to install the fluid damper that's in the garage though too!!
the pros is that it grabs and puts all the power down great and instant, revs quick, doesn't mind an 4k launch or a 24psi+ brake boost on the highway at all (tires being at -5 camber do though, haha)