BMW G20 M340i / G22 G26 M440i DeepFlow Valved Catback Exhaust System

Take your B58 to the next level with the DeepFlow Catback Exhaust, built to deliver an aggressive deep and refined sound without the rasp and harshness of typical setups.

Fitment
BMW G20 M340i 2020-2026
BMW G22 & G26 M440i 2021-2026

Why DeepFlow
We were one of the first to develop a true single midpipe design for the M340i and M440i platform. Unlike the common dual midpipe setups that create a high pitched raspy and almost obnoxious tone, this system transforms the sound into something deeper meaner and aggressive in the right way.

Sound Profile
Deep and aggressive tone under throttle
Mean powerful presence without sounding harsh
Eliminates the raspy tinny sound found in most B58 exhausts
Smooth and refined during daily driving
No drone

Features
Single midpipe design to reduce rasp and enhance depth
Full T304 stainless steel construction for maximum durability and corrosion resistance
Precision TIG welding with very clean craftsmanship throughout
Valved system so you can switch between loud and quiet whenever you want
Direct bolt on installation with no cutting required
Engineered specifically for the B58 platform

Tip Options
Silver
Black
Carbon Fiber

What Makes It Different
Most B58 exhaust systems use a dual midpipe design which is why they all end up sounding similar. The DeepFlow system changes that and gives you a deeper more refined tone that is still aggressive without the obnoxious rasp.

What to Expect
Instantly deeper and more aggressive sound
Strong presence without the harshness
High end build quality you can see and hear

If you want your M340i or M440i to sound aggressive without sounding cheap or too raspy this is the setup for you.

In-stock items are shipped out from our California warehouse within 1-2 business days unless stated otherwise.

Returns are accepted on new, uninstalled items in original packaging. Lighting and exhaust products include a 1-year warranty unless stated otherwise.

Email support@buildbargain.com with your vehicle's year, model, trim, and any helpful photos. Our team can help confirm fitment before you order.

We provide everything that is needed for installation.

Aero Products
Can include one or more of the following: adhesive tape, screws, pry tools, etc.

Lighting Products
Designed for plug-and-play installation.

Exhaust Products
Can include one or more of the following: clamps, couplers, connecting hardware, etc.

Professional installation is always recommended for the best fitment and end result.