If they baseline at 230, so they are saying 100+HP in gains is legit for a cam, shorties (which don't do much) and minor head work? Those numbers are pretty close to blower gains.
An 07+ 6.0L stock makes 275RWHP, so yes, 340RWHP on that engine is possible, but still stretching the limits.
An 07+ 6.0L stock makes 275RWHP, so yes, 340RWHP on that engine is possible, but still stretching the limits.