Are you talking for the 400.0 or .1? Just curious as i have run a 400.0 several times and was not impressed at all... yeah it piss revs, but in the cut felt like just a hair more power than my ms362... i wouldnt put it anywhere near 044 territory, but my 044 has the lower transfers opened up a hair, no port time changes though, just smoothed transition on the lowers and widened the intake and exhaust a hair... you say 044 and i think tractor like tq that pulls an 8 pin with minimal bog... the 400 i ran was as peaky orslightly worse than my 362... drop it 50rpm out of the power band and it fell on its face.... heres a vid of my 2 saws, you can see theres a vast difference between them...LOL