R1 Performance Package | R230 | SL 550 | 413 HP / 422 LB-FT | 5.5L NA V8 | M273

R1 Performance Package for 221 - S 550. Includes ECU Upgrade and Stainless Steel Header. Up to 413HP and 422 LB-FT.
Gains: +31HP & +31LB-FT

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

SL 550 (R230) Stock Performance:

• 382 HP / 391 LB-FT

Modified Performance:

• 413 HP / 422 LB-FT

Gains

• +31 HP / +31 LB-FT