44% under what the other stores charge
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The ARM N54 Turbo Outlets are 2-inch T6061 aluminum charge-pipe outlets that replace the 1-inch factory outlets on BMW N54 twin-turbo engines. Doubling the outlet diameter improves airflow after the turbos, which ARM claims adds up to 25 whp and strengthens low-end torque. They suit N54 owners chasing bolt-on power and a freer charge-air path, and they cost far less than a turbo upgrade for similar gains. Owners rate them highly, though most note the install is tight and the gains are modest without supporting mods.
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Lowest price we've seen: $99.90 on Nov 13 at Amazon. Tracked across 14 stores since Nov 13.
Owners rate the outlets highly and report a noticeable pull improvement, especially in the midrange. Most say the install is the hard part, not the part itself.
The ARM N54 Turbo Outlets are made for N54-equipped BMWs. They improve airflow after the turbos by enlarging this section of piping to 2 inches, up from the stock 1 inch. This section is the first component of the charge-air system.
The outlets are made of T6061 aluminum. A CNC-machined, OEM-style V-band connection at the turbo fits any OEM-style or upgraded turbo that uses the 2-inch OEM connection. The OEM outlets use a divorced piping design that keeps the air from each turbo in separate channels. These outlets merge the charged air from both turbos upstream so it combines before entering the FMIC.
The two sections are joined by a 5-layer silicone coupler designed to resist expansion under high boost. Two T-bolt clamps secure the coupler. The outlets are listed as adding up to 25 whp and improving low-end torque.