Here, this is from a notepad file when I was looking for a resonator for my civic. Sorry I know its a huge jumble, but basically its maker/part#/resonator length/overall length. Think they are all 2.5" in/out but not sure;
magnaflow #10416 14" (20") Recommended
magnaflow #10426 18" (25"
Dynomax Race 24235 Shell Dia 4" Length 18" (23.5" Overall)
Cherry Bomb: 87885 Length 18" (23 Overall)
Flowtech: 50225 Length 18"
Cherry Bomb 87521 Shell Dia 3.5" Length 8" (12" overall)
Magnaflow 18125 Shell 3.5" Length 18"
As I recall, the first magnaflow is the one Heeltoe/Rv6 suggest for the TL's replacement. Maybe this helps