I have one. The TRD 10inch clutch package came with a new heavier flywheel, pilot, throw out, clutch, and pressure plate.

On my rig I decided to go this route becuase I too needed a new clutch. I also have a LC header and 2.25 free flow exhaust. My diffs are 4.10's and I run 33x12.50.15 mud tires.

It does just fine on the highway but on the trails I really do need lower gears in the diffs.

I like it and Im glad I have it! Soon I will regear and it will really help then.