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I could be totally wrong here, but I think that corsa is among the quieter rear sections. For what you are looking for, it may be easier to stick with the corsa rear and switch to a high flow X or stock X with test pipes.
That being said, I'm looking for a corsa rear section for my e90. I'm located in Texas and don't have anything to trade.
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2011 E90 M3 DCT ZCP | Dinan coilovers | Future Classic 18/15 spacers | SSP clutches
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