Exhaust› Exhaust Pipes, Systems and Components

ARM Motorsports

F30 N55 4-Inch EWG Downpipe

$197.00

SKU: F30N55DP

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Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The ARM Motorsports F30 N55 Downpipe is a performance exhaust component designed for BMW N55 engines with a 4-inch EWG turbocharger. It is constructed from SS304 stainless steel and features two O2 sensor bungs. This downpipe is compatible with any aftermarket exhaust system that can connect to the stock N55 downpipe. It is intended for off-road and racing use only.
Show original supplier description
The ARM Motorsports F30 N55 Downpipe is engineered to enhance the exhaust system of compatible BMW N55-powered vehicles. Constructed from durable SS304 stainless steel, this 4-inch diameter downpipe is designed to optimize exhaust flow and increase overall system volume, particularly noticeable under full throttle and during cold starts. It features two O2 sensor bungs for sensor integration and a lifetime warranty against defects in craftsmanship and fitment. This downpipe is compatible with aftermarket exhausts that can connect directly to the stock N55 downpipe. For those seeking an even more aggressive exhaust note, pairing it with a full aftermarket exhaust system is recommended. Installation may require up to 12 hours for certain models, and it's important to note that a bracket for the AWD transfer case might require adjustment or removal for easier installation of the top v-band clamp. This product is strictly for Off-Road Use Only and is not legal for use on public roads in most jurisdictions. It is intended for racing vehicles only. The downpipe is designed to fit BMW F-series models equipped with a 4" EWG Turbocharger, including the M135i, M235i, 335i, 435i, and M2, all powered by the N55 3.0L engine. Specific fitment applies to models produced after 07/13.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandARM Motorsports
Part NumberF30N55DP
CategoryExhaust
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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