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Eisenmann Race experience
I put Eisenmann Race cans on my 06 Z4M roadster with ESS V2500 and no other mods ....decent low tone.....no/insignificant rasp in my opinion.....and I think actually too quiet with no worry for being ticketed. Like it significantly better than stock.....but would not mind some more volume and looking for ways to do that without spending huge amounts or messing with ESS tune.
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