Thread: how much hp do you get out of catback exhaust for a 08 civic si?, a full exhaust?
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Old 02 Jan 2009, 07:46 pm
Shark Tek Shark Tek is offline
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Join Date: Oct 2007
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With a lot of luck you can get 3whp.Catbacks are for sound mostly in the case of the 06+ SI. The stock one has a pretty good flow from the factory. This is the reason of why I have a Electronic Cutout on my FG2 (SI 2006). When I open it is like disconnecting the rear end of the Race Header having full flow.Look at the link below.































www.8thcivic.com
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