G8X M2/M3/M4 Downpipes | S58 Downpipe Upgrades

G8X M2/M3/M4 Downpipes

If you’re looking to upgrade the exhaust system on your G87 M2, G80 M3, G82 M4, or G83 M4, upgrading the downpipes is one of the major exhaust modifications available for the S58. It is also one of the best and easiest ways to make more power!

We carry multiple G8X S58 downpipe options, including catless and catted options from MAD, VRSF, and ARM.

Why Upgrade Your G8X Downpipes?

The factory downpipes are designed around emissions, noise, and OEM requirements.

Aftermarket downpipes are designed to change the exhaust system’s flow characteristics and, depending on the configuration, can provide a more aggressive exhaust note and support performance-oriented builds.

Downpipe options can also be paired with other G8X exhaust upgrades, including midpipes and axle-back systems, allowing you to build your exhaust setup around the sound and performance characteristics you’re looking for.

MAD BMW S58 Downpipes

One of the most popular options we carry is the MAD BMW S58 Downpipes for G87 M2, G80 M3, G82 M4, and G83 M4.

Shop MAD BMW S58 Downpipes

These downpipes are designed specifically around the S58-powered G8X platform and are available for customers looking to upgrade the factory downpipes.

They are available for:

G87 M2
G80 M3
G82 M4
G83 M4

MAD S58 3.5” Fat Boy Downpipes

For customers looking for a larger-diameter option, we also carry the MAD BMW S58 3.5” Fat Boy Downpipes.

Shop MAD S58 3.5” Fat Boy Downpipes

These are designed for the G87 M2, G80 M3, G82 M4, and G83 M4 and feature a 3.5-inch design.

The Fat Boy option is a great choice for customers building a more aggressive S58 setup and looking for a high-flow downpipe design.

MAD S58 Catted Downpipes With No CEL Guarantee

If keeping a check engine light off is a major priority for your build, we also carry the MAD S58 Catted Downpipes With No CEL Guarantee and Flex Section.

Shop MAD S58 Catted Downpipes With No CEL Guarantee

These use high-flow catalytic converters and are designed for G80 M3, G82/G83 M4, and G87 M2 applications.

MAD specifically advertises a No CEL Guarantee for this product, making it an option worth considering for customers who want a catted setup with additional peace of mind.

Important: This product is listed for race/off-road use. Always check your local emissions laws before purchasing or installing aftermarket downpipes.

VRSF G8X 3” Race Downpipes

We also carry the VRSF 3” Race Downpipes for the S58 G8X M3 and M4.

Shop VRSF G8X 3” Race Downpipes

The VRSF downpipes use a full 3-inch design and are constructed from 304 stainless steel with mandrel-bent tubing and TIG-welded construction.

VRSF designed these downpipes to maintain a full 3-inch diameter nearly all the way through the system rather than necking down near the turbos. These downpipes also include Grade 12 mounting hardware and a VRSF lifetime warranty against defects and fitment issues.

The G8X VRSF race downpipes fit:

2020–2023 G80 M3
2020–2023 G82 M4
2020–2023 G83 M4
RWD and AWD models, including Competition models

VRSF lists these as race/off-road-use downpipes, so customers should verify local emissions requirements before installation.

ARM S58 Downpipes

We also carry ARM S58 Downpipes for the G8X M2, M3, and M4.

Shop ARM S58 Downpipes

ARM offers both catless and catted configurations.

The downpipes use 304 stainless steel construction and a 3-inch turbo-side flange. The catless version uses a resonator, while the catted version uses a 200-cell high-flow catalyst. ARM also incorporates a reinforced flex section into the longer downpipe.

The ARM downpipes fit:

G80 M3
G82 M4
G83 M4
G87 M2

ARM states that the catted version may still produce a CEL, while the catless version is intended for off-road/racing use.

Catless vs. Catted G8X Downpipes

One of the biggest decisions when choosing G8X downpipes is whether you want a catless or catted setup.

Catless Downpipes

Catless downpipes remove the catalytic converters and are generally chosen for maximum exhaust flow and a more aggressive exhaust character.

They are commonly used for race and off-road applications.

Catted Downpipes

Catted downpipes retain high-flow catalytic converters.

They’re a popular choice for customers who want to modify the exhaust system while retaining catalytic converters.

The exact CEL behavior depends on the specific downpipe, vehicle, calibration, and configuration. That’s why we recommend checking the individual product details before ordering.

Which G8X Downpipe Is Right For You?

With multiple brands and configurations available, we give our customers several ways to build their S58 exhaust setup.

MAD — Multiple options including standard S58 downpipes, 3.5” Fat Boy downpipes, and catted No CEL Guarantee options.

VRSF — 3” race downpipes and a broader catless downpipe option for G8X S58 applications.

ARM — 3” S58 downpipes with both catless and catted configurations.

The right choice depends on your exhaust goals, whether you want catted or catless, and how the vehicle will be used.

Upgrade Your Downpipes Now

Whether you’re building a G87 M2, G80 M3, G82 M4, or G83 M4, we have G8X S58 downpipe options from multiple manufacturers.

From MAD and VRSF to ARM, you can compare different designs and configurations to find the downpipe that fits your build.

Always verify fitment and understand the emissions requirements in your area before installing aftermarket downpipes.

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