Sonnax performance converter kit FD-RK-23 is available for Ford 4R100, 6-stud converters. The Sonnax heavy-duty, damperless multi-plate kit pairs the salvaged OE fluid coupling parts (impeller, stator and turbine) with new heavy-duty front cover, clutch plates, piston and turbine hub to increase overall converter capacity. Clear instructions, minimal setup and easy assembly make these foolproof upgrades. All-new kit components eliminate the rework and limitations associated with salvaged parts.

• Forged chromoly damperless piston features heat-treated splines and resists bending under extreme lockup pressure
• Increased oil flow improves cooling and lubrication of clutch plates
• Three high-thermal, non-segmented and high-torque capacity friction elements deliver solid holding power