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Old

Jul 28, 2003 | 08:13 PM

#1

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Exhaust Dia.

Im finally getting around to removing my cats. I have full Borla. I am going to have a shop weld in stainless straight pipe where the cats were. What size is the OD on the pipe before and after the cats? Thanks.

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Jul 28, 2003 | 08:35 PM

#2

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From: Bergen County, NJ

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Re: Exhaust Dia.

I belive it's 2 1/2"

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Jul 28, 2003 | 08:47 PM

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Re: Exhaust Dia.

i heard that 2 3/4" is the diameter for optimum flow, and the 3" systems are best for sound.

does anyone know for sure?

i do think the stock piping is 2 1/2"

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Jul 28, 2003 | 09:02 PM

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Re: Exhaust Dia.

I think it may be 2 1/2. Anyone else?

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Jul 29, 2003 | 04:31 PM

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Re: Exhaust Dia.

?

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Jul 29, 2003 | 04:33 PM

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From: Phoenix

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Re: Exhaust Dia.

Pretty sure its 2.25". You can use 2.5" pipes though.

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