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Brushed stainless steel B58 downpipe with a braided flex section, V-band outlet and mounting bracket
B58

BMW B58 Gen 1/2 5" Downpipes

$240.00
In stock
SKU GP-B58-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 5-inch downpipe for first- and second-generation B58 engines. The downpipe bolts to the turbocharger and carries exhaust gas back into the system, and on the factory car it is built around the primary catalytic converter — the biggest single restriction in the exhaust path.

The B58 responds unusually well to having that restriction removed. Lower backpressure means the turbo spools against less resistance, and it gives a tuner considerably more to work with.

The B58 generations are not interchangeable. This downpipe is for Gen 1 and Gen 2 engines; Gen 3 cars take a different part, listed separately. If you are not certain which generation your car has, ask us before ordering. A tune is required, these are 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 M340i G20 B58 Confirm with us
BMW M240i G42 B58 Confirm with us
BMW M440i G22 B58 Confirm with us
BMW 340i F30 B58 Confirm with us

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

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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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