Sonnax Super Hold Servo Kit K65703-1 For GM 200, 200-4R, 200C Transmissions – Billet Aluminum

If you’re building a GM 200, 200-4R, or 200C transmission, you want the Sonnax Super Hold Servo Kit.

This is the K65703-1 kit, and it’s a game-changer for performance and durability.

It’s made from 6061-T6 billet aluminum and steel—tough stuff.

This is a performance/custom part, not stock junk.

It helps improve band application and hold, which means firmer shifts and less slippage under power.

It crosses to part numbers like S54907BS, K65703, and S54905B.

Made right here in the USA.

It’s a universal fit for these transmissions, but it’s definitely a performance upgrade.

If you’re pushing more power or just want your trans to live longer, this is a smart upgrade.

Grab the Sonnax kit and build it right the first time.