Pay in 4 interest-free payments of $280.00 Learn more
Ships within 48 hours · Estimated delivery Oct 13 - Oct 18
+81 HP / +55 LB-FT
82mm throttle body kit and RENNtech stainless steel headers for a gain of +53 HP and +58LB-FT over stock
Plug and Play with original plugs No cutting wires
a link pipe set with integrated exhaust valves
665 awtq @ 3
RENNtech ECU Upgrade | R231 | SL 550 | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 mercedes-benz-amg-gt--190---2015-2017--gt--2016-2017--esr9621144 +81 HP / +55 LB-FTECU Upgrade 500HP 625LB FT Gains: +26HP +59LB FT RENNtech tuning products are certified to meet CARB standards in all 50 States. Our intermediate level ECU upgrade for the Mercedes M278 engine still offers huge gains in performance across the entire RPM range, but with a slightly reduced peak HP and torque from our standard tune. This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline
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