The original exhaust on my '86 300E has come up to the end of its usable lifespan and it now has holes in both the resonator and the muffler. I'm planning on getting the Eberspaecher replacement muffler and resonator to replace everything rear of the catalytic converters.

I would like to do this myself but I have no welding equipment. The pictures that I've seen of the system don't show any joints that use bolts to connect the two pieces. Are there slip-on joints on the Eberspaechers or will I have to take it to a shop to have them weld the resonator and muffler together?