N54-M54 Adapter

BMW N54 – M54 Intake Manifold Adapter

This adapter is specifically engineered to allow the installation of the high-flow BMW M54 intake manifold onto N54 engines, making it an ideal solution for high-performance and high-boost applications. By enabling the use of the M54 manifold’s more open and efficient runner design, it significantly reduces the airflow restrictions found in the factory N54 intake system—especially at higher RPM.

PERFORMANCE-FOCUSED DESIGN

In modified N54 setups, particularly those running upgraded, hybrid, or single-turbo configurations, the stock intake manifold can become a major bottleneck at higher engine speeds. The M54 intake manifold features a balanced runner layout and increased internal volume, allowing the engine to breathe more freely and efficiently in the upper rev range.

This adapter provides a smooth, step-free transition between the M54 intake manifold and the N54 cylinder head, minimizing turbulence and pressure loss. The result is improved volumetric efficiency and more consistent power delivery under sustained load.

PERFORMANCE BENEFITS

• Improved airflow in mid and high RPM ranges

• More efficient cylinder filling under high boost

• Increased top-end power and extended power band

• More stable AFR and EGT values

• Ideal for performance and motorsport-oriented N54 builds

PRECISION MACHINING & DURABLE CONSTRUCTION

Manufactured from a high-strength, heat- and pressure-resistant alloy, the adapter is designed to withstand the extreme operating conditions of turbocharged engines. Precision CNC machining ensures accurate fitment, excellent sealing, and long-term reliability even under sustained high boost.

OPTIMIZED INTERNAL FLOW GEOMETRY

The internal port geometry is carefully designed to provide a seamless, step-less transition between the M54 intake runners and the N54 intake ports. This minimizes airflow disruption, reduces turbulence, and maximizes volumetric efficiency across the entire RPM range.

IDEAL FOR PERFORMANCE BUILDS

• Big-turbo, hybrid-turbo, or single-turbo N54 setups

• High-boost street and track applications

• Drag racing, roll racing, and circuit builds

• Projects focused on maximum airflow and top-end performance