ARM Motorsports N55 Intake - BMW E82 135i & E90/E92/E93 335i/335xi

ARM Motorsports' N55 intake is a complete induction redesign for the E-series N55, reworking everything from the turbo inlet to the air filter to improve airflow, turbo spool, and throttle response. Moving the filter to behind the headlight shortens the induction path by 68% compared to the OEM setup.

At the center of the system is a redesigned turbo inlet that inserts into the OEM turbo with factory-like precision, then rapidly expands to 3in and holds that size the rest of the way to the filter. The factory inlet necks down to 46mm before the turbo; ARM's inlet measures 75mm, a 63% increase over stock.

Construction

• Redesigned turbo inlet, expands to 3in and holds that diameter to the filter (75mm at the turbo versus 46mm OEM, a 63% increase)
• Oval air filter sized for the space behind the passenger headlight, 124 cubic inches of surface area
• CNC machined MAF flange relocating the MAF sensor to the primary intake runner pipe
• PCV port on the intake tube to keep the factory PCV system connected
• Open-ended bracket to keep the filter stable under aggressive driving

What's Included

• ARM N55 turbo inlet adapter
• ARM intake silicone coupler
• ARM intake runner pipe
• ARM high-flow air filter
• ARM PCV hose
• MAF extension harness
• Clamps

Installation Notes

The included MAF extension harness clips into the factory harness near the back of the engine and runs to the new MAF location on the intake pipe, so no cutting or splicing of factory wiring is needed.

Product Specifications

• Rated gain: up to 11whp
• Turbo inlet diameter: 75mm (versus 46mm OEM, a 63% increase)
• Induction path length: 68% shorter than OEM
• Filter surface area: 124 cubic inches
• Application: BMW E82 135i, E88 135i, E82 135is, E90/E92/E93 335i, E90/E92 335xi, all N55 3.0L
• MPN / SKU: N55INT

Frequently Asked Questions

Do I need to cut or splice any wiring to install this?
No, the included MAF extension harness clips into the factory harness and runs to the relocated MAF sensor.

Does this keep the factory PCV system working?
Yes, a PCV port on the intake tube reconnects the factory PCV line.

Why is the filter located behind the headlight?
That location lets ARM shorten the induction path by 68% versus the OEM routing, which is where most of the airflow improvement comes from.

Fitment

• ARM Motorsports N55 Intake - BMW E82 135i & E90/E92/E93 335i/335xi
• BMW E82 135i, E88 135i, E82 135is, E90/E92/E93 335i, E90/E92 335xi, all N55 3.0L
• E90 335i 3.0T I6 [N55]
• E92 335i 3.0T I6 [N55]
• E93 335i 3.0T I6 [N55]