g-56 Spec clutch stage 3+ with billet flywheel, $1000, installed May 10
 

I had my clutch changed recently. The new one is a Spec 3+ with solid flywheel. Disc facings are sintered iron in a copper matrix (similar to feramic).
The pressure plate has a slightly longer clutch pedal throw with the same pedal force as stock to create a higher clamp load on the disc. Torque handling capacity is 1264 ft-lb.

This clutch engages nicely, but makes some noise in neutral with the clutch engaged.

I don't like the noise and am probably going to put the dual mass back in the truck.

If anyone is interested in an excellent condition Spec 3+ clutch with the billet solid flywheel, respond here or send me a PM.
List price for the clutch: sd033f disc and pressure plate = $989.
sd06s solid billet flywheel conversion = $479.
I'll sell the system for $1000.
The clutch was installed May 10, 2011, and has only been used as a daily driver by an aging responsible adult.