CTS Turbo BMW S58 F97/G01 X3M/X3MC & F98/G02 X4M/X4MC High-Flow CATS
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). Confirm your exact car with us before ordering.
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
High-flow cats that replace the restrictive factory catalytic converters on the X3 M and X4 M. Less back pressure means more power, and the sound changes too. With the stock exhaust it gets louder and deeper, with more crackle on downshifts, yet stays quiet when cruising and doesn't drone.
What you get
- Cast T304 stainless construction, TIG-welded by hand with back-purged welds.
- 200-cell high-flow catalysts.
- CAD-designed for factory-location fitment and checked on a real car.
- More volume with an aftermarket exhaust fitted behind them.
Good to know
- A check-engine light will come on unless the car runs proper Stage 2 tuning software.
Brand: CTS Turbo · Part #: CTS-EXH-DP-0043-CAT
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). Confirm your exact car with us before ordering.
| 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
Pairs well with
Active Autowerke GESI Catted Downpipes - S58 X3 M / X4 M (F97/F98)
Active Autowerke AFlow Catted Downpipes - S58 X3 M / X4 M (F97/F98)
Spool S58 Race Downpipes - F97 X3 M / F98 X4 M
