• 4L80-E (Dual Stator), 4L80-E (Early Single Stator), 4L80-E (Late Single Stator), 4L80-E, 4L85-E, Multi-Plate Performance Converter  Performance Converter Kit GM-RK-485WC

Sonnax Performance Converter Kits

Engineered to Deliver Builds that Last

Designed from the ground up to outperform OE and other aftermarket components, Sonnax has you covered with a full line of performance converter kits for gas and diesel vehicles. Offering the widest variety of options in the aftermarket, these innovative kits deliver customized performance and value.

  • Small/Large Diameter
  • Single-Plate/Multi-Plate/Non-Lockup
  • Dampered/Damperless


Choose the right kit for your rebuild!