new rksport headers???

hey, i just got a 99 z24 5spd today and im starting my "mod-work" I was on rksports website and they have a new header for 96-02 2.4L cavaliers. Its a 4-2-1, and its ceramic coated. It looks bad ass, but does anybody have proof of performance 'greatness.' I havent heard much about them, and i want to make sure its a good $450 investment before i resume ordering it.

http://www.rksport.com/prod_detail.php?prod_id=020910025&view=detail

that pic is actually the ecotec header...the 2.4 will look different.

I'd get a catback and high flow cat first before ordering the header if you wanna go the exhaust route first.