Best Small block Headers?

Go with Doug's headers and save some money! And the same 450 HP motor you MIGHT see a 5 HP peak over the Doug's (using there step headers). Now if your motor is pumping out 525 or better (or if you plan to upgrade) id go with the TTi step headers. Now if you pumpin out over 600+ I'd go for the TTi 1 7/8 size headers.