Wanted: 4 into 1 merge collector for 08 header for Pre-CAT delete and smooth rounded 90° up-pipe to mid-pip transition.
Options are:
1) Snag an S1 header, polish and mod the rear hanger
2) Mod the 08 header. See option 4
3) Mod R6 header. See option 4
4) Build it
A couple of sources are for...