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i went with the remus axelback which basically just replaces the mufflers. a little pricey, but it sounds great.
I added the supersprint midpipes and wagner catless downpipes later to make a full exhaust. both of which needed to be modified however. I dont think the muffler/axelback section is a major restriction. the big restriction is the downpipes....
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2011 BMW Z4 35i | FBO | VTT Stg 2+ (EK, 20T clipped)| Motiv PI| Motiv Tuned | Fuel-IT Stg 2 + inline fuel pump | Spec Stg 3+ clutch | MFactory flywheel | 606whp 575Lbs |
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