Thread: b18c1 going into 99 Civic LX 4dr - need some help!
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Old Sep 12, 2006 | 08:09 PM
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jdmeg6hatchy
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From: Virginia
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I believe youll need a different cat. I have a ITR header on mine and the oem civic cat wasnt even close eneough in size. I needed a 2.5" cat
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