The R1 performance package for the Mercedes 550 includes our proprietary ECU upgrade in addition to our stainless steel shorty headers designed specifically for the 550 V8 for a combination that provides increased performance, sound and throttle response across the vehicles entire powerband.

R1 performance package includes:

• RENNtech ECU Upgrade
• Stainless Steel Shorty Headers

E 550 (212) Stock Performance:

• 382 HP @ 6000 RPM; 391 LB-FT @ 2800-4800 RPM

Gains:

• 420 HP @ 6000 RPM; 421 LB-FT @ 2800 RPM