Should I use stock header or aftermarket header with my superchager?

 

if you had a b-series motor, i would say either use the JDM header or the DC JDM header. in my opinion you should go w/ the kamikaze header, cause of the 2.5" (i think) collector. get rid of your cat or get a carsound one to accompany the header.

 

for a SC, I would recommend the JG/Edelbrock header - you should put the DC next to it, side by side - the difference in the inner diameter is amazing.

 

a DC 4-1 JDM header would be best, however a US DC 4-1 would be fine. Kamakazi is supposedly good, but I havent seen any substantial reason to choose it over DC, except price. It is widely used, though, so you can't really go wrong with either choice.

Also you want a 2.5" exhaust, cat, and resonator for optimal performance with the s/c.