I'm making 300ft lbs of torque. The stage 3 is supposed to be rated at 450. Pretty easy to drive around town with. Almost no chatter. They have a complete kit with aluminum flywheel for $502.
http://gripforce.com/f1-racing-stage...5i-528i-m3-z3/
http://gripforce.com/f1-racing-stage...5i-528i-m3-z3/

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