Thread: R31 Exhuast
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Old 04-13-2007, 12:48 PM   #1
Octane Boosters
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R31 Exhuast
Hi i have a R31. I dont think im getting enough back pressure what should i do. I have Extractors straight through to a canon on the end. No Resonator Or Cat.

Would i be losing performance no have a resonator or muffler
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