More info
All SPEC modular flywheels have a 6,9 and 12 bolt pressure plate pattern.
Torque specifications (in pounds) for each stage
Stage 1 : 550 lbs
Stage 2 : 630 lbs
Stage 2+ : 705 lbs
Stage 3 : 755 lbs
Stage 3+ : 875 lbs
Stage 4 : 755 lbs
Stage 5 : 1060 lbs