Unlock the full potential of your Harley-Davidson engine with DME Racing’s Billet Plenum — a precision-engineered intake solution built for high-horsepower performance. Machined from solid billet aluminum on our in-house 5-axis mills, this plenum is designed to eliminate the airflow issues and pressure fluctuations common with OEM intake plenums. Engineered for Performance The DME Billet Plenum smooths out the pressure differential inside the intake system, damping low-pressure pulses into a steady, continuous airflow. This means more reliable power delivery, quicker turbo response, and less lag. Whether you’re chasing big horsepower numbers or just want consistent throttle performance, this plenum delivers measurable gains. Built to Dominate Larger plenum volume equals more airflow stability — and that translates to more horsepower. Our billet design maintains equal distribution across all cylinders, ensuring smoother combustion and improved reliability under extreme boost conditions. FITMENT Harley Davidson Milwaukee-8 Engines / 2017 Harley Davidson Twin Cam Engines Installs easily with your existing factory hardware — no custom bolts required (hardware not included). FEATURES Race track tested and proven 100% billet aluminum construction – designed and CNC machined in-house Improves airflow and dampens low-pressure pulses for steady, consistent intake charge Billet turbocharger plenum for high-performance turbo applications Comes standard with 2.5” Wiggins Weld-on Flange and O-Ring (Wiggins clamp sold separately) Made in the U.S.A. Important Notes Not compatible with fixed lower fairings on liquid-cooled models What is a Motorcycle Plenum’s Purpose? The Intake Plenum is a part of your motorcycle’s intake manifold. The primary function is to transfer the fuel-air mixture to the cylinders. During the fuel distribution, the pressure in the manifold should be higher than that in the cylinders during their intake stroke. The intake plenum’s function is to produce this high pressure. It is basically a pressurized air enclosure. The manifold has a row of individual tubes called runners that extend out of the plenum. They supply air/fuel mixture to the respective cylinders. The runners occupy a smaller area of the plenum surface.
