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https://x-ph.com/active-autowerke-bmw-e9x-n51-n52-328-exhaust-gen-ii/
ACTIVE AUTOWERKE BMW GEN 2 SIGNATURE 328I EXHAUST N52 PERFORMANCE
The Active Autowerke GEN II N52 exhaust allows up to 40% more flow than the stock 3328 exhaust for max power and best sound. It comes with 80mm dual exhaust tips and compatible with BMW 325, 328 and 330.