[Stewart Way]

Think you are right. I remember collector extensions that were slip on but every collector I have had bolted on to 2 primary tubes. I see some stainless ones with spring attachments. Just too many words to say "collector". We know what they are saying but why not just say collector, not multi-piece exhaust collector? But Mr Tech Man, I don't need them because I have a 1 piece collector, not multi-piece. I was an NHRA tech man for years and this is what causes problems. Poorly worded rules or should I say wording open for arguement.
And are these really better-safer. Both do the job if they are secured but neither if they are not. I'm just being picky I guess.