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had that x pipe on my old E90 paired with meisterschaft GT2. was genuinely so insane to put it in the simplest terms. that quad resonator setup really helps dial the idle even up to the mid rpm’s down a chunk so it’s not so overbearing. even with the meisterschaft and that x pipe i never had any drone in the cabin and the car had shorter ratio LSD so highway RPM’s were always at about 3500-4000.
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