If it's not under $200 and they don't install themselves, they probably will not sell mass quantities. Maybe if it were 7 years ago there would be more of a market, but not these days.
But the primaries would probably be 1 5/8ths and 1 3/4ths max, keep the rear header and crossover one piece, leave the lower downpipe flange in an easy access spot and v-band. Also put the 02 sensor bung on the crossover near cyl. #6, the values will be the same from the front bank to the rear bank and very easy to access. Possibly leave a bung for wideband. 3" downpipe with direct bolt on to factory catback. Also if you could upsweep the primaries that would be awesome.
