I have a Mazdaspeed header for the 1.5L ZL-VE from Japan. It's a 4-2-1 header. It came with a Mazdaspeed certification thought I can't read it because it's in Japanese. Drop me a PM and I might be convinced to sell it. I was kind of holding on to it because it was a cool JDM product but I can't run 2 headers at once.
The OBX one is on the left and the 4-1 is supposed tol help out with the top end. The one on the right is a JDM Mazdaspeed 1.5L 4-2-1 header that is supposed help out with the mid range.