340i/440i SINGLE EXIT EXHAUST

The ARM 340i / 440i Single Exit Exhaust is the final step for the all-in B58 enthusiast chasing the lightest, loudest setup available. It connects to the end of the ARM 340i / 440i Midpipe and extends the 3.25" piping all the way to a passenger-side single-exit tip. This is the axle-back section only — the ARM 340i / 440i Midpipe is required to run it.

Highlights

• Exotic exhaust note
• Shave 20+ lbs off the OEM exhaust
• Full straight-pipe design
• Zero cutting required
• Fits OEM and many aftermarket diffusers

Transform the sound of your B58

By removing the muffler and all resonators, this section gives the most direct path for exhaust to exit your B58 through the single 3.25" tip.

Construction

Built from high-quality T304 stainless steel with mandrel-bent curves, it completes the ARM 340i / 440i exhaust that begins with the ARM B58 Downpipe. The section connects to the midpipe and secures to the passenger-side hanger, leaving a single 3.25" tip exiting the passenger side of the diffuser. Running a full 3.25" system pulls the most flow from your B58, and you'll drop over 20 lbs versus the OEM exhaust. It fits with no cutting or trimming of the OEM system and swaps in about 45 minutes with a basic tool set — so you can return to a stock muffler later if you ever want to.

In the box

• 1x ARM B58 Single Exit Exhaust
• 1x Exhaust Clamp

Fitment

Backed by ARM Motorsports' lifetime warranty against defects in craftsmanship and fitment.

Emissions disclaimer: This product is intended for off-road, race, or closed-course competition use only and is not legal for use on pollution-controlled vehicles operated on public roads in most states and provinces. You are responsible for compliance with all applicable emissions laws. Please check your local laws before purchase and installation.

Ships from our Vancouver shop — KORE SPEED is proudly Canadian-owned, with no surprise cross-border duties for Canadian buyers. Questions on fitment? Email support@korespeed.com.