[zeniac]

Which is more prone to failure, catalytic converter or resonator?

I think my Magnaflow cat. converter is falling apart. It rattles when I start up the engine, and occasionally rattles while driving.
When I knock on the cat. converter, it rattles.

[Robert]

Originally Posted by zeniac

Which is more prone to failure, catalytic converter or resonator?

I think my Magnaflow cat. converter is falling apart. It rattles when I start up the engine, and occasionally rattles while driving.
When I knock on the cat. converter, it rattles.

Cats have a catalyst material inside that breaks down over time. Especially if you are running a little rich which most boosted cars must. A resonator is simply perforations in a metal liner so a cat would certainly wear out much faster then a resonator would.

[zeniac]

took the cat. converter today.
it is a magnaflow universal 3" cat. converter.
check it out:

[Robert]

Looks like it might have collapsed...

[EXD]

Originally Posted by Robert

Looks like it might have collapsed...

Well, it sure doesn't look new atleast

By the way, is that a 300cpi? I might be wrong, but doesent that look like a ceramic catalyst too?

I would suggest a new, metallic catalyst (more durable) and 100cpi (better flow), unfortunatley I haven't seen any 100cpi catalyst in the US, best I've seen is 250cpi @ genuinesaab.com