I am wondering which one flows better? I know the diameter of the borla is bigger, but since the stock is almost EL, would it flow better? it just kinda popped into my head on my way home from work today. It seems like I have lost some down low power on my RS, but I can't think of why?
I have Torque grind cams from Delta
Borla UEL headers
STi Mid-pipe
Devil Axle-back
Any thoughts?