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err... i dont understand why you would want a isf rear thou, it has the quad tips...
im with llama. u get the quad tips with the stock IS sound? doesnt really match. i'd rather save the time and effort by just getting a tanabe, at least it sounds alot better than the stock exhaust
Not a big fan of the gap either. I thought the quad exhaust on IS-F doesn't really produce or use the full quad exhaust? Someone mention that it was mainly for looks. Not sure though, could of read this in the earlier spy tech.