RENNtech ECU Upgrade CLK 320 (W208- 225 HP / 241 LB-FT) mercedes-benz-sl-class--230---2007-2011--sl63-amg-esr5733179 Installation requires no modifications to

Installation requires no modifications to the trunk lid or body work and installs using 3M double sided automotive adhesive strips

RENNtech AMG GT R Brake Ducts are designed to improving brake performance during dynamic road and track driving

No cutting wires

This is a slight reduction from our standard tune but still offers white knuckle performance at one of the most affordable price points in the tuning market

6 at 2950 rpm  553

RENNtech ECU Upgrade CLK 320 (W208- 225 HP / 241 LB-FT) mercedes-benz-sl-class--230---2007-2011--sl63-amg-esr5733179 Installation requires no modifications toRENNtech ECU Upgrade for 208 CLK 320, up to 225HP, 241LB FT. Gains: +10HP & 12LB FT RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980's! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability. RENNtech tuning software