SKU: 8804625749

N55 CATTED DOWNPIPE - F3X - 4" EWG | Faster Turbo Spool | Improved Exhaust Sound

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Description

N55 CATTED DOWNPIPE - F3X - 4" EWG | Faster Turbo Spool | Improved Exhaust Sound30 Day Money Back Guarantee IN STOCK HIGHLIGHTS Gain up to 23whp 29wtq Faster Turbo Spool Improved Exhaust Sound Upgrade to Stage 2+ Tuning SS304 Stainless Steel 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

  • 30 Day Money-Back Guarantee | IN STOCK



HIGHLIGHTS

• Gain up to 23whp/29wtq
• Faster Turbo Spool
• Improved Exhaust Sound
• Upgrade to Stage 2+ Tuning
• SS304 Stainless Steel
  

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

The M235i in the video below is only equipped with the ARM N55 4" Downpipe, it is otherwise on a 100% stock exhaust.  The car has never even been flashed, it is on the original DME programming from BMW.  The ARM N55 Catted Downpipe will increase the overall volume of your BMW, open up the exhaust burbles even on OEM programming, and make the turbo spool significantly more audible. 

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

• ARM N55 Catted Downpipe
 

FITMENT GUIDE

The ARM F-Series N55 Catted 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
 

ARM MOTORSPORTS LIFETIME WARRANTY

Every ARM Motorsports product is backed by a lifetime warranty which is automatically issued at the time of purchase. Your warranty protects you against any defects in craftsmanship or fitment. The warranty entitles you to a replacement unit.

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.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 8804625749

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4.9 ★★★★★
Based on 19 reviews
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V
Verified Purchase
Victoria Feliz
Grantham, US
★★★★★ 5
Works well, good price.
Color: Arctic White
Effective, fast charging. A little big and heavy but still lighter than a standard Mac charger. Works on my Macbook and my android. Got my Macbook from 0% to 50% in about 30 minutes, while I was using it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
A
Verified Purchase
Amazon Customer
Louisville, US
★★★★★ 4
Reliable and Convenient Fast Charger!
Color: Black
I recently purchased the 100W USB-C Charger from Anker, specifically the PIQ 3.0 Compact and Foldable model, and I must say that it has exceeded my expectations in several aspects. Here's why I believe it deserves four stars: First and foremost, the charging speed is impressive. With 100W of power, this charger is capable of rapidly charging a variety of devices. Whether it's a smartphone, tablet, or even a laptop, the Anker USB-C Charger gets the job done quickly and efficiently. The PIQ 3.0 technology ensures optimized charging for compatible devices, saving me precious time and keeping my devices ready to go. The compact and foldable design is a standout feature of this charger. It takes up minimal space, making it perfect for travel or everyday use. The foldable prongs allow for easy storage and protect them from damage when not in use. Its lightweight and portable nature make it convenient to carry in a bag or pocket, ensuring I have reliable charging wherever I go. The build quality of the charger is top-notch. The materials used feel durable and sturdy, giving me confidence in its longevity. Anker is known for its high-quality products, and this charger lives up to that reputation. I appreciate the attention to detail in its design and construction. Another positive aspect of this charger is its compatibility with a wide range of devices. Whether it's USB-C or USB-A, this charger can handle it all. The versatility it offers is a definite advantage, as I can charge multiple devices simultaneously without the need for separate chargers. Anker's commitment to safety is evident in this product. The charger incorporates multiple safety features, such as overcurrent protection, overvoltage protection, and temperature control. This gives me peace of mind knowing that my devices are being charged safely without the risk of any damage. While the Anker 100W USB-C Charger has exceeded my expectations in many ways, I feel there is room for improvement. The inclusion of a USB-C to USB-C cable would have been a nice addition, as it would provide a complete package for charging devices. Additionally, a travel pouch or case to keep the charger and cable organized during travel would be highly appreciated. In conclusion, the Anker 100W USB-C Charger, PIQ 3.0 Compact and Foldable model, is a reliable and convenient fast charger that delivers on its promises. Its impressive charging speed, compact design, and wide compatibility make it an excellent choice for anyone in need of a powerful and portable charging solution. With its sturdy build quality and safety features, I have no hesitation in recommending this charger.
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Reviewed in the United States on July 4, 2023
J
Verified Purchase
JD
Bozeman, US
★★★★★ 5
Great charger, works as intended.
Color: Black
Works great, I’m able to use my Legion Go S docked to my TV with this charger whereas a 65W charger it would slowly discharge. Highly recommend for PC handheld users.
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Reviewed in the United States on May 18, 2026
G
Verified Purchase
GBarrington
Louisville, US
★★★★★ 5
An excellent companion for my Galaxy Tab S9,
Color: Grey, Color: Grey
I'm experimenting with replacing my Windows PC with a higher end tablet. so I wanted a docking station (let's call it the DS) to connect it to a mouse, keyboard, and most i importantly, my 28 inch display screen. So Far, So Good! This review is going through the docking station, the S9, and DEX, then displayed on a nice big screen! I REALLY like using a REAL keyboard! Once it was delivered, I rushed to my workstation to see how it worked. And it didn't! Nothing, NOTHING would work. It kept telling me to check the cables. So out of frustration, I had lunch. It turned out that the case I bought for the S9 fooled me into thinking I had the DS plugged into the tablet, but it was not. Once I had figured THAT out, the docking station, and the tablet worked well together. I like that I'm using two different RF Dongles for the keyboard and mouse plugged into the DS. I don't have to use battery power to use Bluetooth for those accessories. Plus, I still have one USB 3.0 port free. The Keyboard and Mouse don't appear to lag, at all. If it does, it is so minor that I am unable to percieve it. I like that I can power the Tablet from the DS. I'm using a 20 watt Amazon charger, and it seems to work just fine. The tablet doesn't give me any messages that I'm on a slow charge and it seems to charge as it does without the DS. The only real negative is that the cable from the DS to the Tab S9 is a bit too short for the tablet to be propped upright. The tablet display remains on, and the S Pen can be used with it. I'm thinking that I might want to use the tablet itself as a sort of touchpad sometimes. I might find applications where I would want the tablet display to remain upright. I don't know, but it MIGHT be a problem, maybe. Build quality seems good. I think the DS case is metal, at least it looks and feels like aluminum. And the cord going to the Tablet seems quite robust. I can't comment yet on reliabiy, It will take some time for that info to appear. But functionally, it is everything the seller claims it is. I am satisfied. Edit: I bought one for my wife.
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Reviewed in the United States on September 8, 2024
E
Verified Purchase
Eye View
Carnegie, US
★★★★★ 5
Awesome tool to have
Color: Grey
The UtechSmart USB C Ethernet Multiport Adapter is a great small and versatile tool. I use it to connect my Android phone or tablet to an HDMI display that is not a smart device. I primarily use it in my kids' room to watch Netflix or YouTube videos on the larger screen, or in our travel van where I have a display for the kids to watch TV while on long travels. I love this tool because it eliminates the need for DVDs, which can get scratched and the kids get tired of watching the same movies. With this tool, I can connect their device to the display, and they can watch everything together on the display and listen through my van speakers. The tool also has other great benefits that I use with my Mac, such as the ability to connect USB devices for external storage, connect to an HDMI display, or connect to Ethernet cables. This is a great tool to have in your computer bag, especially if you use a Mac or any other computer with a USB C port. Pros: Small and lightweight Versatile Easy to use Affordable Works with a variety of devices Cons: The HDMI port only supports 4K output at 30fps The Ethernet port does not support Gigabit speeds Overall: I highly recommend the UtechSmart USB C Ethernet Multiport Adapter. It is a great tool for anyone who needs to connect their devices to a variety of displays or peripherals. Overall, I am very happy with the UtechSmart USB C Ethernet Multiport Adapter. It is a great product that I would recommend to anyone.
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Reviewed in the United States on July 23, 2023

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