ive heard 550hp but its not set in stone. The way i look at it, if you replace it its one less thing to worry about in the future when you have fuel delivery problems. BTW the 1/4 issues ive heard/seen are false if you install a PPE billet pick up (cant say for the rest). I run mine pretty low alot and have had no issues
I was thinking the Hellman sump or SIKDMAX version. Dont know if it would be worth my time or money to get one though.