Rvng 6” Gen 3 B58 Downpipe fits all Gen 3 B58

RVNG RaceWorks BMW performance downpipes

Rvng RaceWorks

Rvng 6” XL FLOW Gen 3 B58 Downpipe FITS ALL GEN 3 B58’s

$449.99 USD

Pickup available at Rvng HQ

Usually ready in 24 hours

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Uncoated
High Temp Ceramic Coating

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Description

RVNG 6” Gen 3 B58 Downpipe – The Largest on the Market

Fits all Gen 3 B58TU2 models

Unleash the full potential of your Gen 3 B58-powered BMW with the RVNG 6” Race Downpipe, designed specifically for the latest B58TU2 engine platform.

Most Gen 3 B58 downpipes on the market use a 4.5” or 5” design. RVNG takes it a step further with a massive 6” inlet, giving your turbo more room to breathe and a smoother path to evacuate exhaust gases.

The difference is more than just size. A 4.5” downpipe has roughly 15.90 square inches of cross-sectional area. A 5” downpipe has roughly 19.63 square inches. Our 6” design provides roughly 28.27 square inches of area, giving it about 44% more flow area than a 5” downpipe and about 78% more flow area than a 4.5” downpipe.

On a turbocharged car, restriction after the turbine is the enemy. By increasing flow area and reducing post-turbo backpressure, the RVNG 6” Gen 3 B58 Downpipe is designed to help improve turbo efficiency, support better response, and provide more headroom for higher-power setups.

Built from premium 304 stainless steel, TIG-welded for strength, and finished with CNC-machined flanges for OEM-like fitment, this downpipe was designed, tested, and proven in-house by RVNG RaceWorks.

Whether you are chasing high horsepower or simply want the best-flowing bolt-on option for your Gen 3 B58, the RVNG 6” Downpipe gives you the airflow advantage no one else can.

Key Features

Massive 6” inlet design for maximum exhaust flow
Fits all Gen 3 B58TU2-powered BMW models
Roughly 44% more flow area than a 5” downpipe
Roughly 78% more flow area than a 4.5” downpipe
Designed to reduce post-turbo backpressure
Supports improved turbo efficiency and power potential
Premium 304 stainless steel construction
Fully TIG-welded for strength and durability
CNC-machined flanges for precise OEM-like fitment
Designed, tested, and proven in-house by RVNG RaceWorks

Vehicle Fitment

Fits all Gen 3 B58TU2-powered BMW models.

Including M50i’s

Note: For off-road use only. Not required to run safely.

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Rvng 6” XL FLOW Gen 3 B58 Downpipe FITS ALL GEN 3 B58’s

Uncoated

$449.99 USD

Fitment Guaranteed

Ships in 1-3 Days

Lifetime Warranty

30-Day Returns

Track Tested

Lifetime Warranty

FAQs

Answers to our most common questions below.

How Long Does Shipping Take?

All RVNG items ship within 1-3 days. If an item is out of stock the customer will be notified with the choice of a refund or an estimated timeline of delivery.

Do You Have Exhaust Parts For My Car?

We make a range of downpipes and exhaust systems for almost all BMWs. We choose to specialize in that market so we can always ensure we are selling the best product possible for your Bimmer!

Do You Offer In Person Pick-Up & Installs In Cali?

Yes, We are located in Garden Grove in Orange County, California. We invite any of our customers to pick-up in stock items and for any install or car related work.

Will Installing These Parts Void My Factory Warranty?

Aftermarket performance parts can affect your factory warranty on related components under the Magnuson-Moss Warranty Act — a dealer must prove the part caused the failure to deny a claim. We recommend speaking with your dealer or tuner. Our parts are precision-engineered to factory tolerances and we stand behind every product with our own Lifetime Warranty against defects and fitment issues.

Do These Parts Require a Tune?

Some parts — particularly downpipes, intake kits, and fuel system upgrades — will require or strongly benefit from an ECU tune to see full performance gains and to prevent check engine lights. Parts like heat exchangers, oil coolers, and hardware do not require a tune. We recommend reaching out to us or your local tuner before purchasing if you're unsure.

What Is Your Return Policy?

We accept returns within 30 days of delivery on unused, uninstalled, and undamaged items in original packaging. Custom or made-to-order parts are non-returnable. To start a return, contact us at contact@rvngraceworks.com with your order number. Return shipping is the customer's responsibility unless the item arrived damaged or incorrect.

How Do I Know This Will Fit My Car?

Every RVNG product is developed and validated on the specific platforms listed. If your exact build year, model, or configuration isn't listed, contact us before ordering — we'll confirm fitment. We stand behind every part with our Fitment Guarantee: if it doesn't fit as described, we'll make it right.