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Does anyone know for sure what the inlet and outlet sizes are for the stock cats and y pipe? Seems like some aftermarket HFC's are 2.35" and others are 2.5".
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07-18-2012, 01:09 AM
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A True Z Fanatic
Join Date: Jun 2011
Location: Madison, WI
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Drives: 2009 370Z
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Stock Cat Specs vs Y-Pipe
Does anyone know for sure what the inlet and outlet sizes are for the stock cats and y pipe?
Seems like some aftermarket HFC's are 2.35" and others are 2.5". How much of an effect on flow would having a switch from 2.35" cats to 2.5" y-pipe be, with regard to turbulence generated by the change in size? And if our stock cats are 2.35" would it be better to mate that to a Y pipe that is 2.35" inlet? EDIT: Searching lead me to stepped exhaust theory which then lead to this: http://my350z.com/forum/intake-exhau...k-for-n-a.html Halfway down, very informative, but I'm not sure whether it would apply to my situation. Last edited by DarkJak; 07-18-2012 at 01:35 AM. |
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