E34 - Cat back Exhasut Replacement

[JimS]

I am planning on replacing the exhaust on an E34 525 from the cat back (after 16 years of service, its time). I have purchased both the center and the rear resonators / mufflers.

Would like some advice - should these be welded together before installation, then entire unit installed?

Interested in others experiences.

Thanks for the help

[yaofeng]

My one piece center and rear is still very good. I recently repaced the cat section. The bolts on the downstream side of the exhaust manifold are easy to remove. I would use stainless steel bolts and nuts to connect the cat section and the rear section.

[califblue]

look here: http://www.bimmer.info/forum/showthread.php?t=20790&highlight=gayle

[JimS]

Thanks for the photos and past thread.

I'll have to do some quick measuring, but from what it looks like, welding first is the way to go.