I have had 2 CM stage 4 clutches. Each time I was breaking it in, I did NOT downshift at all, and I stayed outta the boost completely for the first 1000 miles.

I have never had any problems associated with how I broke them in. You will get some chatter with this clutch, but once you get used to it, you can actually modulate the clutch pedal so that its pretty smooth. They do grab really hard when you first start breking them in, but it will tone down a little bit when its broken in completely. Dont get me wrong IT WILL HOLD all the power that you throw at it, but wont be quite as harsh when it grabs.

Jonathan
95 Eclipse GS
8 injector
Hahn Stage 3.5
Howell 2.2L Stroker

T O T A L L E D, T H A N K S T O S O M E A S S H A T!!!!!!!!!!!!