RENNtech ECU Hand Held Tuner | HHT | SL 63 AMG | R230 | 534HP/485LB-FT | 6.3L N/A | M156 mercedes-benz-c-class--217---2014-2020--s63-amg-esr5011825 RENNtech M273 Biturbo ECU Upgrades

RENNtech M273 Biturbo ECU Upgrades

Eliminates the spongy feel

our exhaust is the ultimate performance upgrade for your SLR

X167 - GLS 600

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RENNtech ECU Hand Held Tuner | HHT | SL 63 AMG | R230 | 534HP/485LB-FT | 6.3L N/A | M156 mercedes-benz-c-class--217---2014-2020--s63-amg-esr5011825 RENNtech M273 Biturbo ECU UpgradesRENNtech ECU HHT (HandHeldTuner) for the 230 SL 63 AMG. Up to 534HP and 485LB FT LB FT. Gains: +16HP & +20LB FT. RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU.