Wouldn't waste your time.
Why would you sell a supposed uprated clutch but not put a torque rating in the description?
"stage 2" probably means "std clutch pressure plate painted black"

Speaking from experience I would advise against Helix. Good clutches that do the job, however they are violent and noisy and ruin the driveability of the car.

EDIT: done a bit of googling about Panther. They are supposed to have 20% torque rating over a standard clutch. However, some people have recieved Valeo branded parts in their kits, others have recieved unbranded parts.

Has anyone ever used a CG clutch? I remember calling them to get a release bearing made for my IB5 set up and the chap on the phone really knew his stuff. I see they offer several different clutchs for the RS Turbo?