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As far as I know, I thought all aluminum flywheels have a turnable/replaceable disc, mine does. There is a race shop near by me that always uses twin disc clutches in their 1000 HP Cobra Mustangs. They require half the foot pressure as a standard single disc clutch. When my clutch finely gives up, I'm getting a twin disc. I think they are 1000-1200 dollars though.
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