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Old 20 Dec 2010, 09:31 pm
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Default 1999 civic lx with cat built into header?

I have a 1999 civic lx with the cat built into the exhaust manifold. I want to get a new exhaust from the downpipe on built the seller says that i need a test pipe. Will i still be able to pass emissions if i have the cat built into the headers and a test pipe on the exhaust. Also how will it effect the sound?
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Old 20 Dec 2010, 09:46 pm
Join Date: Nov 2009
Posts: 60

test pipe is just a open cat, You should put back same as is if you want to have same sound. A test pipe in replace of a resonator would make car sound louder.
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Old 20 Dec 2010, 10:01 pm
Join Date: Dec 2010
Posts: 46

you would probably want to keep the cat just get a cat back exhaust you should pass an e test if you leave the cat on
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