RENNtech ECU Upgrade | R231 | SL 550 | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 aston-martin-dbx707-esr8045635 No Sweat Exterior The outside

No Sweat Exterior The outside stays dry

they offer lighter weight and improve performance by reducing back pressure

The Akrapovič Slip-On system is made of our proprietary titanium

549 HP @ 6800 RPM

RENNtech ECU Upgrade | R231 | SL 550 | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 aston-martin-dbx707-esr8045635 No Sweat Exterior The outsideECU 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