Performance package R1 includes our proprietary HHT - Hand Held Tuner ECU Upgrade and crankshaft pulley in addition to our higher efficiency intercooler pump for increased, power, performance and throttle response across the entire powerband.

R1 Performance Package includes:

• RENNtech HHT - Hand Held Tuner ECU Upgrade
• RENNtech Crankshaft Pulley
• RENNtech High Flow Intercoooler Pump

SL 55 (R230) Stock Performance:

• 493 HP @ 6100 RPM; 518 LB-FT @ 2650-4800 RPM

Modified Performance:

• 538 HP @ 5900 RPM; 566 LB-FT @ 2650-4500 RPM

Modified Performance:

• +45 HP / +48 LB-FT