A performance torque converter is highly specialized based on the performance characteristics of the specific vehicle. And Sonnax has several levels of kits to ensure the best combination of performance and value for each application.
Sonnax 300mm performance converter kit GM-RK-405 for GM 4L60-E, 4L65-E, 4L75-E (300mm) applications delivers the performance characteristics of a high-stall with maximum lockup capacity. Sonnax racekits ensure fast, easy assembly with predictable tuning adjustments.
Sonnax offers the most comprehensive range — and growing number — of converter kits for anyone building a GM 4L60-E, 4L65-E, 4L75-E (300mm). Other kits that utilize GM 245mm or 258mm core are available.
Includes Sonnax base kit GM-RK-20M.
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.