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ARM Motorsports 6" B58 Catted Downpipe BMW 240i 340i 440i 540i 640i 740i F30 F22
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Vendor: TruCrane Motorsports
Type: Exhaust
Sku: B58DPC
Available: Available
Sold by Carkart, an authorized reseller.
Returns accepted within 30 days | support@buycarkartvogue.com
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ARM Motorsports 6" B58 Catted Downpipe BMW 240i 340i 440i 540i 640i 740i F30 F22
$587.00
Free Shipping
HIGHLIGHTS
• 6" 200 Cell High-Flow Catalyst
• Improved Exhaust Sound
• Faster Turbo Spool
• 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.
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.
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.
FAQs
Have a question ? We are here to help.
Is the shipping free?
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.