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ARM Motorsports N55 4" Catted Downpipe (EWG Models) - Various BMW F2x / F3x Models 2012-2018
Lease for as low as $/week
HIGHLIGHTS
• Faster Turbo Spool
• Improved Exhaust Sound
PROFILE
An F30 N55 Downpipe is regarded as the best hardware upgrade to get the most power from your N55 powered F3X BMW. The ARM N55 Catted Downpipe offers the same benefits as the catless option with added benefit of reduced exhaust odor.
The stock N55 downpipe comes from the factory with a catalyst that severely restricts exhaust flow. Upgrading your downpipe unlocks power, improves turbo spool, allows you to run stage 2+ tuning, and increases the exhaust note of your N55 powered BMW all at once. An N55 downpipe upgrade is the first hardware upgrade every N55 owner should invest in.
ENHANCE THE SOUND OF YOUR N55
CONSTRUCTION
The ARM N55 Catted Downpipe is built with mandrel bent SS304 stainless steel and backed by the ARM Motorsports Lifetime Warranty. The ARM N55 Catted Downpipe starts with a 4" diameter at the precision CNC machined turbo v-band connection. It transitions to the 5" 200 cell sport catalyst, and gradually reduces to a flared joint to optimize exhaust flow while matching up to the stock midpipe v-band connection perfectly.
The ARM N55 Downpipe features two O2 sensor bungs to allow for reinstallation of the OEM oxygen sensors. The O2 sensor bungs are located higher up on the ARM downpipe to avoid stretching the O2 sensor wires during installation. A tune or CEL Delete will be required to avoid a check engine light from displaying on instrument panel.
FLASHING STAGE 2+
By improving exhaust flow the ARM N55 Catted Downpipe prepares your F-Series BMW for the higher boost tunes. If you already have a software program for your N55 chances are these tune files are already pre-loaded into your software waiting for you to flash after your downpipe installation. Most tunes require an upgraded downpipe and FMIC to run properly, if you don't also have an intercooler upgrade check out our F3X FMIC. The ARM N55 Catted Downpipe will allow you to run any tune that requires a downpipe upgrade. Stage 2 N55's can see power around 400whp and 400wtq.
IMPROVED EXHAUST SOUND
In addition to helping your N55 make more power and torque, it significantly improves the exhaust sound. While the downpipe only accounts for approximately 20% of the entire exhaust system, upgrading it will produce a noticeable increase in volume, especially under full throttle and on cold starts. If you're looking for a more extreme sound, you can pair the ARM N55 Catted Downpipe with a full exhaust. The ARM N55 Catted Downpipe is compatible with any aftermarket exhaust that can connect to the stock N55 downpipe.
IN THE BOX
FITMENT GUIDE
The ARM F-Series N55 Catted Downpipe is designed to fit the vehicles listed on the chart below with a 4" Electronic Wastegate 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 |
Note: This product is for Off-Road Use Only. Items sold for off-road use only are illegal to use on public roads in most states and provinces. This product is intended for racing vehicles which may never be used on a public road.
Not available for sale to the state of California.
Returns may be accepted within 14 days of purchase pending Return Merchandise Authorization (RMA). No returns or cancellations on special order items. All returns will be charged a 20% restocking fee, no exceptions.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. Item must be able to be resold as new.
Several types of goods are exempt from being returned. Hazardous materials, fluids, greases, chemicals, and clothing are not able to return.
Free shipping is available within the lower 48 states for most orders totaling $199 or more. A free shipping option will be available during checkout. This offer is for delivery address in the continental United States and excludes shipments going to Alaska, Hawaii, Military Boxes, and items that require freight shipping.
Processing Time
Patterson Performance stocks a large quantity of items at any given time. Some items may require drop shipping from one of our various distributors. In stock items will ship within 1-2 business days. If you're needing your product quickly, please contact us to verify product availability before placing your order. Orders requiring additional verification (security concerns, incorrect information, etc.) may need additional processing time. Estimated shipping dates are not guaranteed and are subject to change based on inventory levels and manufacturer lead times. Backordered items are shipped immediately once available.
Items ship daily, If the item you ordered is not in stock, a member of our team will contact you via email / phone.
Patterson Performance will only ship to an address that varies from your billing address if payment is made via Paypal or a financing partner.
Patterson Performance ships from multiple warehouses throughout the United States, and sometimes from manufacturers overseas.
You can simply contact us via email / telephone for a live inventory check
Find more information at www.P65Warnings.ca.gov.