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Discussion Starter #1
Has anyone replaced their exhaust manifold for a catless header?
If so, which brand and how were the results??
I figure thats the biggest bottleneck our civics have and it looks to be a pretty big catalyitic converter.
 

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Nope, can't be done.

BUT, you can install a test pipe (Header) which delete's the cat and a quick search would have answered this in matter of seconds.
 
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