the Shortie does not need an O-ring between the body and piston is to seal the BOV

In addition to classic functionality

to delivery a laminar flow of oil to your turbocharger

This means the modification is completely reversible

and for longer

Clutch Kit - Xtreme Performance Heavy Duty Organic 260Nm KTY22017-1A JR12 the Shortie does not needXtreme Performance sprung organic kit 1A Recommended for: Street use in vehicles with minor engine modifications. Sprung organic clutch kits offer exceptional driveability for vehicles used daily but also have performance modifications. The sprung organic disc offers improved dampening which reduces the shock loading on the transmission. Specifications: Torque capacity 260Nm Clamp load Increased over standard Organic Friction Discs Heavy Duty Pressure