My stock clutch went at 99k (flywheel started shuddering) and the Clutchmaster Stage 1 installed by Massive started slipping at 125k and total burnup shortly after. Went back to stock, been happy. No more flywheel chatter, lighter clutch pedal, smoother engagement, same performance.
Aftermarket is a joke. The LuK is the most durable, easiest to live with clutch for the SVTF.