i recommend the 4-2-1 header...easier to install and easier to work on (i.e. changing an oil pan gasket)...

like other said before check groupbuy center and for sale adds...those will get some decent priced ones...i suggest staying away from pacesetter (the cheapest) unless you only want it to last a year...basically search the web looking for vendors of dc sports...and what i usualy do is find a place with the lowest price then call a dealer i've ordered from before to see if they will beat the price