I have a stage III kevlar clutch from SPEC on my Stroked LT1
I'm making about 390RWHP but plan to go above 400.

The current 4 disc Kevlar only lasted about 12k miles.
the thing will lose holding pressure after getting hot now.
I have hardly ever driven the car hard and have never droped the clutch at high RPM. I do mostly street driving in moderate traffic at times which means some stop and go casuing me to slip the clutch a bit to get started. this is needed with the bigger cam I have and the chatter I get with the Kevlar material.

Is this normal wear people are seeing with around 400RWHP?
Spec says it is supose to hold much more than this BTW

And,
I hear that SPEC now has a 5 disc carbon version that is not as chattery as the kevlar and holds just as much as the Kevlar.
Anyone have some feedback using the newer 5 disc with more than 400RWHP? Chatter in daily driving? Hold at the track?

What would people recommend for a replacement?