- Description
- Fitment
- Refund Policy
HIGHLIGHTS
• Faster Turbo Spool
• Improved Exhaust Sound
PROFILE
The ARM E-Series N55 Downpipe is designed to increase power and performance of your N55 equipped BMW by optimizing exhaust flow and reducing back pressure.
Upgrading the downpipe on your N55 increases power, improves turbo spool, and allows you to run stage 2+ tuning, all while making your 135i or 335i sound better. The ARM N55 Downpipe is compatible with OEM and aftermarket midpipes, designed for a direct fit with the 80mm V-Band flange that accommodates both standard and upgraded turbo setups. An N55 downpipe upgrade is the first hardware upgrade every N55 owner should invest in for more power!
IMPROVED EXHAUST SOUND
In addition to helping your N55 make more power and torque, the ARM N55 Downpipe significantly improves the exhaust sound. Thanks to it's 4.5" middle section, the ARM N55 Downpipe will produce a deeper and more aggressive exhaust note, especially under full throttle and on cold starts.
CONSTRUCTION
The ARM N55 Downpipe is built with high-quality TIG welded SS304 stainless steel. It begins with a precision CNC machined 80mm V-Band flange which fits both the OEM N55 turbo as well as many N55 turbo upgrades. The V-Band flange is welded directly to a flex section to alleviate stress from the N55's turbo during aggressive driving. 
One unique feature of the ARM N55 Downpipe is the 4.5" middle section, which transforms the sound of your N55 beyond a standard 3" downpipe upgrade. The downpipe transitions from the 4.5" diameter at the middle section to dual 2.5" diameter flanges at the midpipe connection. This allows for seamless integration with OEM and aftermarket midpipes that fit the OEM N55 downpipe.
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.
IN THE BOX
• 2x Midpipe Gaskets
• 4x Bolts, Washers, and Nuts
FITMENT GUIDE
The ARM E-Series N55 Downpipe is designed to fit the vehicles listed on the chart below with an N55 engine
| Make | Model | Submodel | Engine |
|---|---|---|---|
| BMW | E82 | 135i | N55 3.0L |
| BMW | E81 | 135i Convertible | N55 3.0L |
| BMW | E90 | 335i | N55 3.0L |
| BMW | E90 | 335i xDrive | N55 3.0L |
| BMW | E92 | 335i | N55 3.0L |
| BWM | E92 | 335i xDrive | N55 3.0L |
| BMW | E93 | 335i | N55 3.0L |
| BMW | E93 | 335i xDrive | N55 3.0L |
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.
Returns
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. All items are subject to 15% restocking fee from the manufacturer.
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.
Additional non-returnable items:
Gift cards
Downloadable software products
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
If you would like to start a return please click here
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund yet, please contact us at info@amtuning.ca.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Labor Fees (if applicable)
AM Tuning Canada is not responsible for, and shall not be liable for, any labor fees, installation charges, removal charges, diagnostic fees, or other service-related costs incurred by the customer or any third party in connection with the installation, removal, modification, servicing, or use of any products purchased from AM Tuning Canada. Unless expressly agreed to in writing by AM Tuning Canada, all such labor and service costs are the sole responsibility of the customer.
Exchanges (if applicable)
To start an exchange, click here
Non-refundable items
The following items are non-refundable and non-returnable once purchased: oils, fuel or oil additives, filters, tuning cables, OBDeleven products, Braum seats, spark plugs, coil packs, and similar consumable, wheel spacers, wheels bolts, license plate brackets, electronic tuning components and any other product subject to discretion of AM Tuning Canada.
Other products from brands such as MHD, Bootmod3, Ecutek, Braum racing, Novitec are also non-refundable and non-returnable.
All sales of these items are final and are subject to the policies and discretion of AM Tuning. By completing a purchase, the customer acknowledges and agrees to these terms.
