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carsound cat question

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Old Jul 9, 2006 | 10:42 AM
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blender989gsr
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Default carsound cat question

hi i just ordered my greddy evo2 exhaust system for my '95 gsr and was planning on buyin a carsound cat also. i wanted to know which would be better, the 2.25 inch inlet/outlet or the 2.5 and why. any help would be great thanks
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Old Jul 9, 2006 | 12:33 PM
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Depends on the header you are using. If your header has a 2.25" outlet, use a 2.25" cat. Otherwise, use a 2.5".

I am using a 2.5" carsound with that exhaust but only because my DP is 2.5".
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Old Jul 10, 2006 | 02:10 PM
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ideally you want to keep the exhaust system the same size from the header to the muffler to avoid any bottlenecks
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