TTI 1-3/4" shorty header power potential

Its probably come up , cant find it.
Has anyone tried to make power with these as an option to the Schumacher headers?
Street based 440 trying to make 550Hp /550Tq and retain power steering without breaking the bank. I know those numbers are very optimistic on the Schu's 1-5/8" primary....

All feedback will be appreciated.