anyone know of any v6 headers out there?

I noticed the the maf sensors are very simalar to the eclipse 90-94 which are very restrictive. One of the upgrades on these cars is to install a "maf translator" (more info on www.dsmparts.com)and a gm 3" maf sensor. I think with this mod., bigger injectors, apex s-afc,headers (if available),and 2.5 in exhuast would be a strong power increase for the v6.
Cams would be icing on the cake if there are any for the engine. Has anyone gone this route in search of HP?

88 Mitsu Van (L300)
90 Mitsu Eclipse GSX
95 Mitsu Montero SR w/285/75/16 torsion bars cranked about 1.5"
04 Mitsu Lancer Ralliart
81 Datsun 280ZX
96 Dodge Cummins Turbo Diesel (316hp/815ft.lbs)