The difference is in price I think. Not sure about sound because of how rare the R1000 is. I was originally thinking about that exhaust until I looked at the price. I know that the R1000 costs about $1,500+ for the y-pipe back portion, while the Tomei would be around that including a titanium Y-pipe.
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Takeda CAI : FI Resonated TP : Stillen UD Pulley
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