Mercedes 722.9 Seven Speed Transmission Upgrade mercedes-benz-cls-class--218---2015-2018--cls-550-biturbo-esr2270978 Rated by RENNtech: 448 HP

Rated by RENNtech:               448 HP @ 5

Hihg-Flow Air Filter

RL (No tall bracket option is available for the Roadsters)

The RENNtech performance turbo upgrade is truly the ultimate upgrade for your E63 (S) AMG Sedan and Wagon

Stock: 550 HP | 502 LB-FT

Mercedes 722.9 Seven Speed Transmission Upgrade mercedes-benz-cls-class--218---2015-2018--cls-550-biturbo-esr2270978 Rated by RENNtech: 448 HPRENNtech Transmission Upgrade for 722. 9 Mercedes Seven Speed Transmissions. With increased engine performance it becomes necessary to further improve the drive line components, most importantly the transmission in order to ensure maximum power is transmitted to the drive wheels without transmission slippage. This can not be realized with software and only truly be accomplished by an internal mechanical upgrade to the transmission hardware. RENNtech