RENNtech Porsche 997 GT3 RS 3.8L ECU Upgrade (462 HP / 332 LB-FT) mercedes-benz-clk-class--209---2004-2010--clk-55-amg-esr9569088 5 Series (E60) 525 i

5 Series (E60) 525 i (HP: 184 | Year: 03 > 05)

0" | Rear: 21" x 11

producing superior surface quality and ensuring an OEM-standard level of fitment

Pre-preg is widely known as the finest process in carbon fiber manufacturing and has been used for aerospace and military applications because of its superior consistency in durability

RENNtech Porsche 997 GT3 RS 3.8L ECU Upgrade (462 HP / 332 LB-FT) mercedes-benz-clk-class--209---2004-2010--clk-55-amg-esr9569088 5 Series (E60) 525 iRENNtech Porsche 997 GT3 RS 3. 8L ECU Upgrade. Up to 462HP and 332LB FT. Gains: +12HP & +15LB FT Our proprietary Porsche ECU upgrade offers rock solid performance from RENNtech, the foremost tuning authority on Bosch and Siemens engine control units. These same units are utilized in Mercedes Benz vehicles, which RENNtech has been tuning since electronic engine management started to show up in vehicles during the mid 1980's, though our proprietary