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on my E92,my pre cata are empty, and i ve got bmw perfomance exhaust.
on 92 no intermediary silencious so i've already only stock cata secondary, but noise is really true present, what advice else you can i put to reduce a little the noise ??
sorry for my english l'm french
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335i Pack M Stage 2 BR Performance 403,5 hp 582n.m/Bilstein B14 pss/R&B PVC2 valve/K&N air filter/Spearco FMIC/pre cata empty/EBC Redstuff,aviation hose, BMW Performance exhaust, Charge pipe Evolution Racewerks, Forge DVs
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