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An F30 N55 Downpipe is regarded as the best hardware upgrade to get the most power from your N55 powered F3X BMW. The stock N55 downpipe comes from the factory with a catalyst that severely restricts exhaust flow.
The M235i in the video below is only equipped with the ARM N55 4" Catless Downpipe, it is otherwise on a 100% stock exhaust.
The ARM N55 Downpipe features two O2 sensor bungs to allow for reinstallation of the OEM oxygen sensors.
By improving exhaust flow the ARM N55 Downpipe prepares your F-Series BMW for the higher boost tunes. Stage 2 N55's can see power around 400whp and 400wtq.
In addition to helping your N55 make more power and torque, it significantly improves the exhaust sound. The ARM N55 downpipe is compatible with any aftermarket exhaust that can connect to the stock N55 downpipe.
The ARM F-Series N55 Downpipe is designed to fit the vehicles listed on the chart below with a 4" EWG Turbocharger only.
| Make | Model | Submodel | Engine |
|---|---|---|---|
| BMW | F20 | M135i | N55 3.0L |
| BMW | F20 | M135i xDrive | N55 3.0L |
| BMW | F21 | M135i | N55 3.0L |
| BMW | F21 | M135i xDrive | N55 3.0L |
| BMW | F22 | M235i | N55 3.0L |
| BMW | F23 | M235i | N55 3.0L |
| BMW | F30 | 335i | N55 3.0L |
| BMW | F30 | 335i xDrive | N55 3.0L |
| BMW | F31 | 335i | N55 3.0L |
| BWM | F31 | 335i xDrive | N55 3.0L |
| BMW | F32 | 435i | N55 3.0L |
| BMW | F32 | 435i xDrive | N55 3.0L |
| BMW | F32 | 435i Gran Coupe | N55 3.0L |
| BMW | F33 | 435i | N55 3.0L |
| BMW | F33 | 435i xDrive | N55 3.0L |
| BMW | F34 | 335i | N55 3.0L |
| BMW | F34 | 335i xDrive | N55 3.0L |
| BMW | F34 | 335i Gran Coupe | N55 3.0L |
| BMW | F36 | 435i | N55 3.0L |
| BMW | F36 | 435i xDrive | N55 3.0L |
| BMW | F36 | 435i Gran Coupe | N55 3.0L |
| BMW | F87 | M2 | N55 3.0L |
Backed by the ARM Motorsports Lifetime Warranty against defects in craftsmanship or fitment. See the full terms for details.
Off-road use only: This product is intended for racing vehicles and may be illegal for use on public roads in many states or provinces.