For those who don't believe in "light weight" flywheels. etc ..READ the first page the link to the Tilton has there...good reading and right on the mark.
My dad changed out his 35 pound clutch/flywheel with a 16 pound set up from Tilton. It realy freed up som HP. Guys that he could hardly keep up with before get smoked on now with just a clutch and flywheel change. It is some $$$ but if you want the best you got to pay.