• 298mm LU (TH250C, TH350C, 200-4R, 4L60 & E), 4L60 (700-R4), 4L60-E (298mm), Multi-Plate Performance Converter 298mm Performance Converter Kit GM-RK-498WC

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!