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15. After a quick once-over to make sure all of the clamps were tight and that there were no leaks, we were ready to fire up the EcoBoost. To see if these bolt-on parts would actually make any more power, we headed back over to Stillen's dyno. Three pulls later, our twin-turbocharged F-150 was producing 49 rwhp more than stock. That's no bull—that's the cold hard facts. Torque was up too, at 10 lb-ft. Some of that power came from the three extra pounds of boost we picked up from the intercooler piping.