The ARM Motorsports N54 Inlet Adapters are designed to allow the use of 2-inch N54 inlets on factory stock N54 turbos. This upgrade is ideal for owners who want to install larger inlets now while planning to upgrade turbos in the future, eliminating the need to purchase two separate inlet kits. These adapters bridge the difference between stock turbine inlet sizing and high-flow aftermarket inlets, making them a cost-effective, long-term solution for any N54 build.

Precision-machined from T6061 aluminum, each adapter is built for durability, superior sealing, and resistance to high boost pressure. The 2-inch side mates directly to upgraded inlets, while the 1.75-inch side is engineered specifically for stock turbocharger interfaces. The turbo-side end includes a machined groove to secure an O-ring, ensuring a tight, leak-free seal even under aggressive boost levels.

Each adapter features three evenly spaced hex-screw mounting points designed to lock the adapter firmly to the stock turbo. Only two of the screws are accessible after installation—and these two are fully sufficient to secure the adapter properly in place.

With high-quality materials, precise fitment, and straightforward installation, the ARM N54 Inlet Adapters provide a reliable and future-proof upgrade path for any N54 enthusiast.

Fitment:

• BMW E82 1M Coupe, 2011, N54 3.0L
• BMW E82 135i, 2008–2013, N54 3.0L
• BMW E88 135i Convertible, 2008–2013, N54 3.0L
• BMW E90 335i, 2007–2010, N54 3.0L
• BMW E90 335xi, 2007–2010, N54 3.0L
• BMW E92 335i, 2007–2013, N54 3.0L
• BMW E92 335is, 2011–2013, N54 3.0L
• BMW E92 335xi, 2007–2010, N54 3.0L
• BMW E93 335i Convertible, 2007–2013, N54 3.0L
• BMW E93 335is Convertible, 2011–2013, N54 3.0L