ARM 4.5" Midpipe for BMW G80 M3 / G82-G83 M4

Overview

The ARM S58 4.5" Single Midpipe upgrade is designed to unleash the incredible exhaust sounds from your G8X M3/M4. By removing the secondary catalysts and two middle resonators, the ARM S58 Single Midpipe substantially improves the sound of your S58-powered BMW. Also, by retaining the OEM muffler, you still have the ability to control the exhaust valves, allowing you to close them for a more subtle tone for when you want to be quiet, or open the valves for maximum sound.

Details

Highlights

• Exotic Exhaust Sound
• Massive 4.5" Design
• SS304 Stainless Steel
• Saves 15lbs Over OEM

Construction

• OEM-style 2-Bolt flange
• Transitions to 4.5" Midpipe section of the exhaust via the slip-fit connections
• Of the OEM exhaust valves
• ARM S58 Midpipe will secure to the exhaust hanger on the passenger's side using the OEM style mounting bracket

What's in the Box

• 2x ARM Downpipe Gaskets
• 1x ARM Extended Brace
• 2x Front 4.5" Midpipe Sections
• 2x Rear Exhaust Sections
• 5x ARM Clamps

Enhance the Sound of Your S58

The ARM S58 4.5" Single Midpipe will not only increase the overall volume of your exhaust but also transform the sound into something truly unique from an ordinary G80 M3. It will also make the exhaust burbles more audible even with OEM tuning. The G82 M4 in the video below is equipped with both the ARM S58 Single Midpipe and ARM S58 Downpipes. Pairing the ARM S58 Single Midpipe with the ARM S58 Downpipes will increase the overall volume of your S58 even more than the S58 Single Midpipe alone.

Axle Back Adapters

The ARM S58 Axle Back Adapters are designed to reduce down at the end of the midpipe to fit most aftermarket axle back systems. Most aftermarket axle back systems reduce down from 3" (76mm) to 2.75" (70mm) and that's where the ARM S58 Axle Back Adapters join the two separate components.

Warranty & Off-Road Use

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.

Fitment

Watch: Video 1, Video 2