Re: Beta swap concerning the exhaust.
you can run the stock exhaust piping from the cat to the muffler but i wouldn't suggest it, like kirk said it will choke the exhaust. from the exhaust manifold to the cat you will need a custom test pipe built to match up with the stock exhaust piping so you might as well swap it all out anyway.
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1999 BMW 328ic
pimpin the convertible for now.
"Crabcakes and football. That's what Maryland does!"
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