ARM S55 3.5" Resonated Single Midpipe Upgrade - F80 M3 | F82 / F83 M4

ARM S55 3.5" Resonated Single Midpipe Upgrade - F80 M3 | F82 / F83 M4

$599.00 $597.00

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NOT FOR SALE IN CA. FOR OFF-ROAD USE ONLY.

Introducing the ARM Motorsports S55 Single Midpipe Upgrade for the F8X platform, the ultimate solution for S55 enthusiasts seeking to enhance the power and sound from their S55-powered BMW. This S55 Midpipe upgrade delivers improved exhaust flow and an incredible exhaust note due to the resonated 3.5" design. Check out the clips below to hear the ARM S55 Midpipe paired with the ARM S55 Resonated Downpipes.

- Up to +20whp / 30wtq

- Improved Exhaust Note
- 304 Stainless Steel

- Faster Turbo Spool

- Fits OEM and Aftermarket Mufflers

CONSTRUCTION

Crafted from 304 stainless steel, the ARM S55 Midpipe Upgrade is built to last. Its mandrel-bent tubing ensures smooth, unrestricted flow, while the lightweight design of only 17lbs reduces overall weight of the exhaust system by 15lbs. When paired with the ARM S55 Track Exhaust, you shave an incredible 40lbs off compared to the OEM exhaust system.

The ARM S55 Single Midpipe starts at the downpipe connections with a precision Y-pipe. This allows you to connect the ARM S55 Midpipe to any downpipe upgrade that fits the OEM S55 Midpipe, including the ARM S55 Downpipes.

This section of the ARM S55 Midpipe includes a 4.5" resonator to tune the tone of the exhaust into a deeper, more desirable range, as the S55 is notorious for having a high-pitched, raspy exhaust note. Paired with the ARM S55 Downpipes, the ARM S55 Midpipe will make your F8X one of the best sounding on the road.

The next section of the ARM S55 Midpipe Upgrade transitions again to a Y-pipe, which allows you to reconnect your OEM muffler. This Y-pipe connects to the single midpipe with a slip-fit connection and then utilizes the two 2.5" pipes included in the ARM S55 Midpipe Upgrade to extend to the OEM rear muffler section, or to the ARM S55 Track Exhaust.

Due to the larger size of the ARM S55 Midpipe, the OEM under-brace cannot be utilized. To address this, the ARM S55 Midpipe includes a specially designed under-brace that is specifically engineered to fit with the larger midpipe. The under brace included in the ARM S55 Midpipe Kit is designed with precision and manufactured from 6061 aluminum to ensure strength, durability, and a perfect fit, while keeping the weight to a minimum. Installation of the under brace is a simple bolt-on process and mounts directly to the factory mounting points, ensuring a secure and stable fit.

IN THE BOX

• ARM S55 Midpipe
• CNC Machined Brace
• 5x Exhaust Clamps

FITMENT GUIDE

The ARM S55 Midpipe Upgrade will fit any downpipes that connect to the OEM midpipes.

Make	Model	Submodel	Engine
BMW	F80	M3	S55 3.0L
BMW	F82	M4	S55 3.0L
BMW	F83	M4	S55 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. The warranty entitles you to a replacement unit.

Orders typically ship in 1-2 business days from our location in Los Angeles, CA. Transit time usually ranges from 3-5 business days, depending on where you are located. Please note that not all of our products are kept on hand and will require some time for production (will commonly be noted in description tab).

We offer worldwide shipping, if you need live outside of North America, shoot us an email and we would be happy to give you a quote!

OUR GOAL

Horizon Motorsport has one goal: to make our clients happy. We aim to provide the highest level of customer service and the highest caliber parts, all at the most competitive prices. Have a question or concern about a product we sell? Send us an email at sales@horizonmotorsport.com.

About Us

Testimonials

Front lip had great fit and finish. All of the carbon fiber parts are from Horizon for a reason.

Chris M.

Consistently good communication throughout my ordering/delivery process. I could not be more happy with my purchase! I will be back at Horizon soon.

Clarance K.

Have been shopping here for years and nothing but good things to say. I've ordered all of my cosmetics and suspension through Horizon, shipping was quick and easy, and the team was communicative.

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