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After reading a little on the ISIS RS3871, would I be able to use my stock exhaust manifold, and o2 housing...I guess what I'm asking is will it bolt up directly and take the place of my T28 without doing anything else to it? (other than drilling larger bolt holes in the oil return line)
If I were to get the RS38, would it effect my tune at all, or could I bolt up and not have to worry about my tunes being effected to the point where I'll need a re-tune?
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