Barnett Performance Products Complete Dirt Digger Clutch Kit Heavy-duty Series K Kevlar friction plates and steel drive plates available individually for most models Complete Dirt Digger clutch kits also available; include friction plates, steel drive plates and springs Dirt Digger kits are available with Series K Kevlar or CF Series carbon fiber friction plates Replace steel drive plates with Cryodized aluminum drive plates for added performance; Cryodized aluminum drive plates are lightweight and will not muddy or contaminate engine oil like other aluminum plates