this isant one of those posts of which one should i get get , i just wanted to know if the greddy header on a b16a sir 2 motor is any good or should i stick whti the DC , i am only asking cause i dont know anything about the greddy

 

Just stick with the DC 4-1. There are hardly any differences between the two other then 4-2-1 and the DC's 4-1 design. For another $350.. I'd just get sometihng else. The DC you have now is fine.