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Pair of brushed stainless steel S58 downpipes with V-band flanges, a braided flex section and oxygen sensor bungs
S58 · G8X

BMW S58 3.5" Downpipes for G8X M3 and M4

$340.00
In stock
SKU GP-S58-DP-01

Off-road and competition use only. For off-road and competition use only. Not legal for sale or use on pollution-controlled motor vehicles. Not CARB certified.

A tune is required. Fitting this part without one leaves the engine running a calibration that no longer matches the hardware, which sets a check engine light and can put the car into reduced power.

Local pickup
Free in South Florida. How it works
Shipping
All states except California. Details
Returns
30 days. Return policy

About this part

A 3.5-inch downpipe set for the S58 in the G8X M3 and M4. The downpipes are the sections of exhaust that bolt straight to the turbochargers, and on the factory car they are built around the primary catalytic converters. That makes them the single biggest restriction in the exhaust path.

Going to 3.5 inches and removing that restriction lowers backpressure, lets the turbos spool against less resistance and gives the car a noticeably deeper exhaust note. It is the change most S58 owners make first when they start chasing power, and it is the one a tune has the most to work with.

These downpipes require a tune. Fitting them to a car still running the factory calibration leaves the engine expecting catalysts it no longer has, which sets a check engine light and can drop the car into reduced power. They are sold for off-road and competition use only, and we do not ship them to California.

Fitment

This fitment list is still being confirmed. Check with us before ordering — send your chassis code, engine code and build date through fitment help.

Vehicles this part is listed for
Make Model Chassis Engine Years
BMW M3 G80 S58 2021–present
BMW M3 Touring G81 S58 2023–present
BMW M4 G82 S58 2021–present
BMW M4 Convertible G83 S58 2022–present

Installation and tuning

Tune required
Yes
Emissions
Off-road and competition use only
California
Not sold or shipped to California

Installation notes for this part are not published yet. If you want to know what the job involves before you order, ask us — or pick it up at the shop and we will talk you through it.

Shipping, pickup and returns

Pick this part up free at the shop in South Florida, or have it shipped to any state except California. Returns are accepted within 30 days.

Shipping details  ·  How pickup works  ·  Return policy

Browse related parts

All Accessories S58 parts G8X M3 / M4 parts

Common questions

How do I know this part fits my car?

Check the fitment table on the product page: it lists the chassis codes, engine codes and model years the part is sold for. If your car is not on it, or the page says the list is still being confirmed, message us with your chassis code, engine code and build date before ordering. A VIN makes it quicker still.

Do I need a tune?

Every product page answers this directly. As a rule, downpipes need a tune and intakes, charge pipes and cooler guards do not. A downpipe on the factory calibration leaves the engine expecting a catalyst that is no longer there, which sets a check engine light and can put the car into reduced power.

What does "off-road and competition use only" mean?

It means the part removes or alters emissions equipment. It is not legal for sale or use on pollution-controlled motor vehicles and it is not CARB certified. Fitting one to a car driven on public roads is the owner's decision and the owner's responsibility. We do not ship these parts to California.

Can I pick up locally instead of paying for shipping?

Yes. Choose local pickup at checkout and no shipping is charged. We are in South Florida and serve Miami-Dade, Broward and Palm Beach. Wait for the ready email before making the trip. Picking up also means we can confirm fitment with you at the counter.

How long does shipping take?

Orders ship from South Florida to all 50 states. Handling and transit times are on the shipping page. Oversized parts move as freight rather than parcel and cannot be delivered to a PO box; where that applies the product page says so and the surcharge appears in the cart before you pay.

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