RENNtech’s ECU upgrade for the M278 offers huge gains across the entire RPM range; increasing crank performance numbers an additional 70 HP and 80 TQ. This translates to an astonishing 530 HP and 606 lb/ft of torque at the crank! These numbers are factored at a conservative 15% drive train loss.
The performance increase is instantly noticeable at the bottom end and continues throughout the biturbo engines broad powerband.
Here is the CLS 550 (C218) dyno sheet:
Our CLS 550 stage 1 ECU upgrade is available now for $2,740. For additional information, visit out product webpage:
or contact one of our sales representatives at 561-845-7888.