BMW M135i M140i N55 – DKU Performance

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BMW M135i M140i N55

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BMW M135i M140i N55

BMW M135i / M140i N55 Performance Enhancement

Experience the true potential of your BMW M140i with our bespoke upgrades, starting with our high‑quality stainless steel exhaust solutions. This BMW M135i arrived at DKU Performance for a fully custom exhaust build, designed to deliver improved flow, sharper sound, and maximum durability. Our systems are crafted from premium 304/316 stainless steel and tailored to support further upgrades such as a **Bmw M140i Sports Cat**.

Custom Exhaust Systems by DKU Performance
We specialise in designing and fabricating complete exhaust setups including performance back boxes, cat‑back exhausts, tubular manifold‑back systems, and full turbo‑back exhausts. Whether you're upgrading for sound, performance, or tuning potential, our custom-made solutions give your **BMW M140i** the perfect balance of tone and responsiveness.

Stage 1 ECU Remap for Maximum Gains
After installing the custom exhaust, we applied a DKU Performance Stage 1 ECU remap. This upgrade pushed the M135i from its stock 315 bhp to an impressive 365 bhp, with torque rising from 450 ft‑lbs to around 520 ft‑lbs. Combined with exhaust enhancements such as a **Bmw M140i Sports Cat**, the N55 engine transforms into a far more dynamic and engaging drive.

Learn more or book your upgrade at https://dkuperformance.co.uk/

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