Originally Posted by AF
Who cares if it's a race header? You'll get an extra 2-3HP from a 4-2-1 compared to a 4-1, but you'll have a lot more torque on the 4-1 Comptech design versus something comparable to DC. Torque on an RSX-S is good, top end is already fine.
Power curve > peak numbers
And that flange looks like it's made to hookup to the stock flex/cat.
You will gain power from not having a cat, I could just get a straight pipe for the comptech but then that would defeat the purpose and might as well get a race header.
The flange is made to hookup to the stock cat.
It connects to the flange on the top of this picture:
This is what the stock header looks like:
