Why do you need to upgrade the N54 charge pipe for your 135i? The OEM BMW charge pipe is a ticking time bomb for any N54 135i running higher than stock boost. Its plastic design will adequately hold the boost on stock settings, but on tuned cars it is prone to bursting. In addition, the OEM diverter valves are another component not designed for high-boost and can leak boost, limiting the power your 135i can put down. Don't wait until yours breaks to upgrade this critical component of your N54!
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