For owners of BMWs powered by the B48 engine, installing a high flow downpipe B48 is among the most effective bolt-on upgrades you can make. Whether you drive a 320i, 330i, 520i, X3 30i or other B48-powered model, a well-designed downpipe dramatically improves exhaust flow, turbo efficiency, throttle response, and exhaust note — giving a noticeable uptick in performance and driving feel.
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