Active Autowerke AFlow Catted Downpipes - S58 X3 M / X4 M (F97/F98)
Ships from the brand or distributor, usually in 3–7 business days
Make sure this fits your car
Fits: BMW S58: X3 M (F97), X4 M (F98)
For off-road / competition use only. Not legal for use on public roads in the United States, including California.
- Shipping at real carrier rates
- 30-day returns on unused parts
- Fitment help before you buy
On the X3 M and X4 M, the stock S58 downpipes slow down exhaust gas leaving the turbos, which slows spool. Active Autowerke's AFlow catted downpipes are its answer, replacing the factory pieces with a freer-flowing design that keeps catalytic converters in place.
What you get
- Catted downpipes for both S58 turbos.
- Active's own AFlow cats.
- Better exhaust flow than stock, which helps the turbos spool faster.
- No performance tune needed, according to Active Autowerke.
Good to know
- Fitment applies to US-model cars. Active Autowerke can't guarantee non-US fitment.
For off-road / competition use only. Not legal for use on public roads in the United States, including California.
BMW S58: X3 M (F97), X4 M (F98)
| Model | Chassis | Years | Engine | Fits |
|---|---|---|---|---|
| M3 | G80/G81 | 2021+ | S58 (BMW M) | |
| M4 | G82/G83 | 2021+ | S58 (BMW M) | |
| M2 | G87 | 2023+ | S58 (BMW M) | |
| X3 M | F97 | 2020–2024 | S58 (BMW M) | |
| X4 M | F98 | 2020–2025 | S58 (BMW M) |
Not sure? Email sales@b58racing.com with your VIN.
- Ships from the brand or distributor, usually in 3–7 business days.
- Shipping is charged at the carrier's rate, shown at checkout. Orders over 70 lb ship by freight for a flat $99.
- Unused parts can be returned within 30 days. Some items are marked no-refund in their description.
Full details are on our shipping and returns page.
Guides for this part
S58 Downpipe Install: G80 M3, G82 M4, G87 M2 and F97/F98 X3 M/X4 M
The S58 has two turbos, so you're swapping two downpipes, two turbo gaskets and four oxygen sensors. The job is done mostly from underneath. You drop the underbody trays and the center brace, support and unbolt the mid p
BMW S58 Mods Guide: M2, M3, M4, X3 M and X4 M Upgrades in Order
On an S58, start with a tune and cooling. These cars make a lot of power stock, and heat is what holds them back on hot days and back-to-back pulls. Next come downpipes and a tune built for them, then fuel: an ethanol an
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