Not really, that's about what stock Duramax, Cummins and Powerstrokes put down. Last 7.3 Powerstroke we did, threw down 270 RWHP and around 480RWTQ(Stock exhaust and stock airbox too). After the SCT programmer threw 398RWHP and 690somethinRWTQ. Turbo back exhaust, intake and a good programmer will net most those trucks over the 400RWHP mark, and over 600+RWTQ. I know some "stack" their programmers, but I personally wouldn't do it to my own truck.