RENNtech R1 Performance Package for Mercedes Benz S550 W221

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  • Regular price £5,290.00
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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


S 550 (W221) Stock Performance:

  • 382 HP / 391 LB-FT


Modified Performance:

  • 413 HP / 422 LB-FT