trial and TRD
are both proven to be very good for the gts (10-11 whp gain). they're both very good quality and the person above me is right--you can't go wrong.
however, both of these headers (trial and TRD
) are jdm only--meaning you have to ship them from japan. that will run you $700-$800 PLUS shipping in the continental US (the 7-8c includes shipping from japan to the vendor).
the dc motorsports headers are thought to be coming out at a price in the ballpark of $400--half the price of the above. dc motorsports also claims to have good gains and seeing how dc motorsports is such a reputable company, i beleive them (but i'd still wait to see 3rd party dynos).
my advice: wait for dc motorsports releases their headers & some dynos are out. if the gains are as good as trial and TRD
..then obviously save the extra $400 and use it for another purpose.