I'm running a P85 on a modded 2013 M800 SP Ltd. Only have about 500 miles on it, but it looks no worse for wear. I did notice that the engine spools up a bit quicker (the clutch is almost 2 lbs lighter then a Cat clutch), and it's certainly quieter as well. This isn't an inexpensive modification, but parts are readily available for servicing almost anywhere. Bear in mind the offset is different as well - even with all of the shims removed between the secondary and jackshaft I was unable to obtain correct offset with the factory secondary, so ended up using a Team Tied. Would I do it again? Likely not, I would probably use a new Cat clutch with TPI Billet Spider and 911 cover (what I have on my EVO boosted M1100T) - the cost is about the same either way, just over $1000 Cdn.Just wondering how many are running the P85 on there cats and how they are holding up?