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*pdiggitydogg* · 01-05-2003, 10:40 AM

no there would be gains made when its still the stock manifold but new exahust piping because its more flow after than before. that air doesnt have to travel as far in as a compact area. since gasses like to expand the sooner they can the better; but if they have to be compressed again after they are more free flowing...i cant think of a good thing to say now but you get the idea...its not as good. as for the cats...it is just a civic so you dont need to worry about it anyways...unless youre running FI where the "recommended" 3" piping wouldnt fit the stock cat (I dont know any FI civics that run 3" pipe though)

01-05-2003, 10:40 AM	#5
pdiggitydogg Yahoo Watashi wa kattaze! Join Date: May 2002 Location: Meanwhile, up in The D... Age: 41 Posts: 10,579	no there would be gains made when its still the stock manifold but new exahust piping because its more flow after than before. that air doesnt have to travel as far in as a compact area. since gasses like to expand the sooner they can the better; but if they have to be compressed again after they are more free flowing...i cant think of a good thing to say now but you get the idea...its not as good. as for the cats...it is just a civic so you dont need to worry about it anyways...unless youre running FI where the "recommended" 3" piping wouldnt fit the stock cat (I dont know any FI civics that run 3" pipe though)