Though it should be well known by now that the EPA is cracking down on tuners selling emission delete devices for those who aim to get more out of their truck engines, obtaining more power without breaking the law is possible. A great example is a 2021 Ford Super Duty with a 64-millimeter turbo from Ryan’s Diesel Service and a PPEI tune. This combination has managed to increase the truck’s 6.7-liter Power Stroke to 632 horsepower and 1,230 lb-ft of torque on the dyno while retaining the EGR, DPF, and all the essential things not to make the modification illegal. Ford Super Duty Diesel Emission…