Standing straight down the strip looking at the front of the CLS550 and CLS63, only the well versed Benz enthusiast will know which is faster. The CLS550 comes with the 4.6-liter V8 that boasts twin Honeywell GT2260 turbochargers and direct injection that join forces to create 402 horsepower. The CLS63 brings to the table a 5.5L V8 Bi-Turbo that produces 518 hp at 5500 rpm and 516 lb-ft of torque at 1750 rpm. So without spending the extra $40K, how can you make your CLS550 beat up a CLS63… By getting a VRTuned ECU Flash. The ECU is really easy to remove from the car and requires it to be bench flashed. You can see from our instructions how simple this process is here. After the ECU is flashed, expect to see your 4.7L V8 go from 402bhp to 480bhp with over 500ft/lbs of torque. With the VR Tuned ECU Flash we adjust the cars boost, fuel, and timing tables. Giving you a very driveable, reliable, and powerful upgrade. In addition to the basic performance tuning, we can also tune for catless downpipes, raise your top speed limiter, and change your torque limits to give you much faster throttle response. All of this is available from VR Tuned for $1500 which is almost 50% less than the competition! Check out this customers vehicle below. Leave a Reply Cancel ReplyYou must be logged in to post a comment.