Our proprietary ECU upgrade for the Mercedes M278 engine in the new GL 550 offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability.Our ECU tune offers the biggest performance gains on the market translating to an astonishing 530 HP and 606 lb/ft at the crank! GL 550 (X166- M278 Biturbo Engine) Stock Performance:
Our online store allows you to choose the best performance parts for your car. Instead of having the items delivered to your home, we can deliver direct to your local service center. You can browse products on this website. Please feel free to place an order and one of our representatives will contact you to arrange delivery and installation if requested of your new performance parts.