4" dump exhaust
Hey does anyone run this. I'm gunna be ordering it soon but my main question is will it bolt up to a 3" o2 housing or do you need the 3.5" o2 housing? I'd like to get this on before I do my Stg 3 install and John you said you have one in stock and since I have the money I figured I could just buy it now. Will it fit a stock turbo 3" o2 housing.
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