I am not sure if this has been mentioned or not but AWR racing now has 4-2-1 headers available for 2.0L Proteges. Check out this link.
Protege Parts at AWR Racing
Or this one:
Protege Headers
If this has already been mentioned, please disregard my post.
Protege Parts at AWR Racing
Or this one:
Protege Headers
If this has already been mentioned, please disregard my post.
