Quote:
Originally Posted by jjflash
So swapping the original factory cats back into a car with an X-pipe will work fine. I don't know how much trouble it would be to do it yet.
They fail the visual, or the sniffer/emissions? That would be something to keep in mind if an '85 or '86 came up. I guess the safe way to go would be to buy a California car and make sure the seller does the smog.
Thanks for the clarification!
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Some designs divide the exhaust into manifold, head pipe, cat, and cat back with a flange between each segment, but more typical is one flange between the manifold and head pipe with everything else welded. Dropping the whole welded exhaust head pipes to tail pipes is a common quick shop operation, like 15 minutes or so. Many keep the original stock, and swap if needed, but unless you use mess up the cat it should pass (new law is however untested).
Without a factory air intake or factory air box many have had their car fail the visual inspection. The catch is all sorts of tasks on the 928 begin with removing the air filter and tubes and over time they get more and more brittle.