I recently aquired what I think is a typer flywheel that has been lightened since it's only 11lbs. Is there any companies that make a cast steel lightened flywheel? I'm also wondering if I should use this flywheel in my GSR turbo setup(full built) or stay with the stock GSR? Would like to get some advise(pros & cons) from anyone who has done this. The tranny has to come out anyways to get a Kaaz lsd installed so I'm wondering if this is a worth while upgrade. I put an 8lber in an old low boost setup I had and the car ran like *** when in boost and cruising at higher speeds. So thats why I'm weary about trying this agian but maybe its different when running higher boost. Any advise is much appreciated.