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Diff between FI 12" & 18" resonators
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05-12-2013, 06:49 PM
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KaienZ34
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Join Date: Oct 2009
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It you stay with stock headers and cats go non-res catback. If stock headers but HFC's or test pipes go 12" res, if LTH's or shorty headers and HFC's/test pipes go 18" res.
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