For sure you cannnot install the ones that run down the firewall with the engine/trans in the way. This is because they are joined together, but I thought if you separate them it could be done. I think I replaced the rear set already once with an OEM part back in the day, and it too rusted out...
Was just at the dealer. Both parts (solid pipe pieces) are available, but the front set that runs down the firewall is on back order. I just got the P/N for rear set of pipes. P/N 87209C. It lists for CAN$335, and the front set lists for CAN$445. Ouch!
I’d like to know as well what the P/Ns are as well. Mine rusted out years ago, I would like to install some new ones. Will be heading to the local dealer this week to pick up some parts I ordered earlier this and will check with them as well.