why didnt you say exhaust manifold ten well it looks better than the standard cast item, but the problem with 4-1 headers is that they really loose you mid range torque, in a big way, no joke. i am gonna get a 4-2-1 supersprint manifold for my clio 1.4 8V, which costs about 130 quid.
If i were you, i would not settle for anything less than a 4-2-1 manifold with primary pipes as long as you can fit and secondary of about 12 or so inches. you can get kits to make headers, or send off the measurements, or even an old manifold to get a custom one.