I have a fiat grand punto 1.2 8 valves 06 model I have a sportex back box exhaust I'm looking for after market center pipe and manifold aswell I do know were to just get like a sports one but not to pricey?

The center pipe is a clean pipe with no silencer or anything (http://www.lvawebcat.com/webforms/frmmain.aspx?mark=1&brand=klariusuk&lang=English) What are you hoping to achieve by changing it?