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CLASS S (W 221) 63 AMG [2 Filters Required] (HP: 525 | Year: 06 > 10)
The RENNtech Rear Diffuser is 100% pre-preg carbon fiber and developed to complement the full RENNtech AMG GT63 aerodynamic program
This high temperature pre-preg carbon fiber tooling yields exceptional results and superior surface quality
Our performance package includes our proprietary ECU tune in addition to our full carbon fiber airbox for a gain of +19 HP and +38 TQ over stock
reduce weight
Mercedes 722.9 Seven Speed Transmission Upgrade mercedes-benz-cls-class--218---2015-2018--cls-550-biturbo-esr2270978 CLASS S (W 221) 63RENNtech 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