ARM Motorsports 6" B58 Catted Downpipe BMW 240i 340i 440i 540i 640i 740i F30 F22

$587.00

$587.00 ~~$587.00~~

Sorry, it's out of stock.

But we can let you know when it's back in.

Shop safely with us

Secure Checkout
Warranty Backed
Genuine Parts

TruCrane Motorsports

B58DPC

ARM Motorsports 6" B58 Catted Downpipe BMW 240i 340i 440i 540i 640i 740i F30 F22

Free Shipping

HIGHLIGHTS

• 6" 200 Cell High-Flow Catalyst
• Improved Exhaust Sound
• Faster Turbo Spool

• Stage 2+ Tune Compatibility

PROFILE

The ARM 6" B58 Catted Downpipe is perfect if you're looking for all of the performance of a Catless B58 Downpipe without the odor associated with increased emissions. Our B58 Catted Downpipe design incorporates a 6" high-flow 200 cell ceramic catalytic converter, making it a standout choice for those seeking power without while reducing emissions. The increased volume and improved turbo spool that from the catless variations are still present in our 6" B58 Catted Downpipe.

B58 6in Downpipe

The ARM 6" Catted B58 Downpipe replaces the restrictive factory downpipe with a 200 cell catalyst with a 6" diameter that significantly improves exhaust flow. This upgrade unlocks additional power and torque while reducing emissions compared to a full catless B58 downpipe, allowing you to safely run Stage 2+ tunes and enjoy a more vibrant sound from your B58-powered BMW.

ENHANCE THE SOUND OF YOUR B58

The ARM 6" B58 Catted Downpipe amplifies the overall volume of your B58's exhaust, bringing out the burbles and enhancing the audible presence of the turbo spool, even on the OEM tune. Below is a sound clip of the ARM 6" Catless Downpipe, paired with our B58 Midpipe, and Single Exit Exhaust.

CONSTRUCTION

The ARM 6" B58 Catted Downpipe starts with a 4.5" diameter precision CNC machined turbo V-band flange which matches up perfectly to the OEM turbo or upgraded turbo with an OEM flange. It then rapidly transitions to the 6" OD high-flow catted section.

The ARM 6" B58 Catted Downpipe features two O2 sensor bungs to allow for reinstallation of the OEM oxygen sensors. The pre-catalyst O2 sensor bung is located closer to the turbo on the ARM 6" B58 Downpipe to avoid stretching the O2 sensor wires during installation. The post-catalyst O2 sensor bung comes with a built-in extension to allow the sensor to reach around the 6" section of the downpipe.

The ARM 6" B58 Downpipe then reduces to the OEM size to allow it to connect to the OEM midpipe or the ARM B58 Midpipe Upgrade. The flex section is incorporated into the ARM 6" B58 Downpipe to relieve stress on the turbo during aggressive driving.

The ARM 6" B58 Downpipe is further secured by the 2-bolt bracket which utilizes the OEM downpipe mounting points.

IN THE BOX

• ARM 6" B58 Downpipe

FITMENT GUIDE

Make	Model	Submodel	Engine
BMW	F22	M240i	B58 3.0L
BMW	F22	M240i xDrive	B58 3.0L
BMW	F23	M240i	B58 3.0L
BMW	F23	M240i xDrive	B58 3.0L
BMW	F30	340i	B58 3.0L
BMW	F30	340i xDrive	B58 3.0L
BMW	F32	440i	B58 3.0L
BMW	F32	440i xDrive	B58 3.0L
BMW	F33	440i	B58 3.0L
BMW	F33	440i xDrive	B58 3.0L
BMW	F34	340i xDrive	B58 3.0L
BMW	F36	440i	B58 3.0L
BMW	F36	440i xDrive	B58 3.0L
BMW	G30	540i	B58 3.0L
BMW	G30	540i xDrive	B58 3.0L
BMW	G32	640i	B58 3.0L
BMW	G32	640i xDrive	B58 3.0L
BMW	G12	740i	B58 3.0L
BMW	G12	740i xDrive	B58 3.0L
BMW	G15	840i	B58 3.0L
BMW	G15	840i xDrive	B58 3.0L
TOYOTA	A90	Supra	B58 3.0L
TOYOTA	A91	Supra	B58 3.0L

ARM MOTORSPORTS LIFETIME WARRANTY

Every ARM Motorsports product is backed by a lifetime warranty which is automatically issued at the time of purchase. Your warranty protects you against any defects in craftsmanship or fitment. The warranty entitles you to a replacement unit.

This product is for Off-Road Use Only. Items sold for off-road use only are illegal to use on public roads in most states and provinces. This product is intended for racing vehicles which may never be used on a public road.

Shipping

Some items will ship directly from the manufacturer or distributor. We will process your order as soon as we can, to ensure minimal delay. Please note that sometimes our inventory system may show an item in stock, while the item is out of stock with the manufacturer or distributor. Should this happen, we'll contact the manufacturer to get a best estimate of when the item will ship out and reach out to you regarding next steps.

Please note that if the item is dropped shipped, the manufacturer may change the shipping carrier beyond our control. We will do our best to ensure you receive the same carrier and shipping time as purchased through us.

For international orders the buyer is responsible for any import duties or tariffs. This includes items shipped from abroad to you, such as KW, PTB

Items that show delivery status as "Delivered" that are Lost or Stolen Are Customers Responsibility.

Returns

You must reach out to us directly for all returns. If the product is unused and uninstalled, we can offer you a refund, or exchange. Returns must be initiated within 30 days(TCM Products have 60 days) of the product being ordered. Once the return has been approved, it is up to you to pack and return the product to the address provided. Return shipping costs are the buyers responsibility. Returns are subject to a 20% restocking fee. Items must be in like new condition.

Fuel items: we cannot accept returns on used fuel systems. This includes, HPFP & LPFP fuel pumps, port injection rails and ethanol analyzer kits.

Please note special order items or items that are built to order, once the item is in production the order cannot be cancelled or returned. Some examples of these products are Clutch Kits, Turbo charger kits, any ApexBuilt Product. If you are unsure if your product would be a special order item, please reach out to us. Contact US

TruCrane Motorsports(TruCrane Motorsports LLC) is not responsible for any products lost or damaged during the return shipping process.

Cancellations

Cancellations on orders of $1000 paid for using Shopify Pay Installments/Affirm are subject to a 3% cancelation fee. This is due to the large order processing fee associated with these sort of payments. TruCrane Motorsports, will cover the additional fees.

Cancellations on orders over $2000 paid for using Shop Pay, Credit Card, or PayPal are subject to a 2% cancelation fee.

Any purchase on our website constitutes acceptance of these conditions.

Warranty

Terms and Conditions of TCM Products that state Lifetime Warranty on their product page. These products have a lifetime warranty against manufacture defects.

This covers things like cracks, and weld failures.

The warranty also does not cover:

- wear items, such as replacing a filter due to age.

- It does not cover dents, scratches, or holes from road debris.

- Improper install; rubbing against something or other issues from faulty installation.

- finishes, so if the finish wears, fades or chips off over time.

- catalytic converter blow out or damaged due to burbles/pop and crackle tunes.

If your item arrives damaged, please email us immediately along with photos of the product, damage and the shipping box.

Got a question?

Shipping Notice

Some oversized, heavy, or specialty items may incur additional shipping charges based on your delivery location. If this applies to your order, our team will contact you after checkout with the updated cost. Orders will not ship until additional charges are confirmed and paid.

ARM Motorsports 6" B58 Catted Downpipe BMW 240i 340i 440i 540i 640i 740i F30 F22

$587.00

FAST SHIPPING
On thousands of in-stock parts
EXPERT SUPPORT
Real enthusiasts, real answers
AUTHORIZED DEALERS
Genuine brands, direct from source

ARM Motorsports 6" B58 Catted Downpipe BMW 240i 340i 440i 540i 640i 740i F30 F22

TruCrane Motorsports

We are a specialty parts provider and performance shop based out of the Washington, DC area. We have been heavily involved in the car scene of DC, Maryland, & Virginia for well over a decade, including working with the SCCA, and multiple local car clubs and our local racetracks. TruCrane Motorsports specializes in aftermarket support for BMWs but we offer services for all cars.

At TruCrane Motorsports you'll find a level of customer service and support, beyond that of any other shop.

We have grown from selling parts and performing installations and maintenance, to also providing our own product line, TCM. TCM is the shop brand for TruCrane Motorsports. We took the same principles of our shop and applied them to our brand. That is why all TCM products have a fitment guarantee and lifetime warranty. We offer competitive pricing, to ensure you're not overpaying for a part.

We strive to provide quality products at a cost effective price.

Curated from trusted manufacturers

30,000+

Performance Parts
Shipped directly from verified suppliers

99%

Order Accuracy
Driven by real enthusiasts

4.9★

Customer Rating

Need support?

Check out our support guides first.

FAQs

ARM Motorsports 6" B58 Catted Downpipe BMW 240i 340i 440i 540i 640i 740i F30 F22

Sorry, it's out of stock.

ARM Motorsports 6" B58 Catted Downpipe BMW 240i 340i 440i 540i 640i 740i F30 F22

Free Shipping

HIGHLIGHTS

PROFILE

ENHANCE THE SOUND OF YOUR B58

CONSTRUCTION

IN THE BOX

FITMENT GUIDE

ARM MOTORSPORTS LIFETIME WARRANTY

Shipping

Returns

Cancellations

Warranty

Got a question?

Shipping Notice

TruCrane Motorsports

Performance Parts

Order Accuracy

Customer Rating

Need support?

Get in touch

SHOP

SUPPORT