Our RENNtech R4 Performance Package features our proprietary ECU upgrade, stainless steel headers, performance sound pipe, 82mm throttle bodies and carbon fiber airbox upgrade

E 63 (212) Stock Performance:

• 518 HP @ 6800 RPM; 465 LB-FT @ 5200 RPM

Modified Performance:

• 575 HP @ 6800 RPM; 525 LB-FT @ 5200 RPM