Original H-Pipe install

Hi guys, i was looking for some advice...

I am replacing an aftermarket H-Pipe on a 1989 LX, and assuming i can get the rusted bolts off, I need to put the original H back on. It's my nephews new fisrt car, and when i crawled under it last night, i saw the craziest 'clamp' in the little emmisions tube. I will need to cut that, as I have no clue how it was installed, but my question is, how would be a good/easy way to attached that tube coming down from engine to the original H-Pipe, w/o welding it? COuld i use a hi-temp silicone sleeve or something? I own a 1986 GT, with original H-Pipe, but haven't had a chance to see how it it attached. I thought someone mention

thanks!!!ed to me that is is with a hard rubber hose?

Hmm, i should have taken a picture of it last night. I sort of follow what you are saying, and YES, that is the craziest clamp i have ever seen. I didn't notice a nut on it, and almost think the previous owner may have welded it back together, so my dilema is how to re-attach once i get it off. Or, did one end fit into the other end from the factory original set-up. I thought it was sleeved with a hard rubber heat resistant hose?

I thought so, and i think the tubing is about 7/8"-1"......I was just talking to local NAPA guy and he had 5/8", but thinks he has some other pieces lying around too.

THanks for your help!