RENNtech R1 Performance Package

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

CLS 550 (W219) Stock Performance:

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

Gains:

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