[mtrsprt]

Chatter from a Spec stage 1 or 2 means there's an issue, or poor break-in. I have always run Spec clutches, and never had chatter.

Some causes of chatter are:

1. Flywheel Has Excessive Run-Out.
2. Fly Wheel Was Not Resurfaced Before The New Clutch Was Installed.
3. Flywheel Was Resurfaced Improperly Or Has Improper Surface Finish.
4. Flywheel Has Severe Hard Spots Or Hot Spots.
5. Flywheel Resurfaced Improperly (I.E. Incorrect Flywheel Step).
6. Bad U-Joints In Drive Shaft Or U-Joints Misaligned.
7. Excessive Backlash In Differential.
8. Excessive Drive-Line Angle.
9. Bad Leaf Springs, Bushings Or Mounts.
10. Improper Gear Ratio Versus Tire Diameter.
11. Defective Pressure Plate And/Or Disc.
12. Disc Has Inadequate Or No Marcel (Not Enough Cushion Between The Friction Facings).
13. Oil Or Grease Contamination On Clutch Facings.
14. Worn Or Damaged Clutch Linkage.
15. Bent Cover Assembly And/Or Disc .
16. Improperly Tuned Engine.
17. Worn Or Damaged Engine Mounts Or Transmission Mounts.&Nbsp;

 

[mtrsprt]

I don't recommend anything but Spec. A stage 2 would be perfect and hold all you can throw at it. I run a Stage 2 on my setup. Zero slip,zero chatter, almost stock feel.