Have Questions?
-
Genuine Parts
Guaranteed Authentic
-
Modification Specialists
Call for assistance
-
Mod Now, Pay Later
Financing Available
-
Save On Delivery
Free shipping on most orders over $199
ARM Motorsports B58 6" Catted Downpipe - Various BMW / Toyota B58 Models 2016-2026
Lease for as low as $/week
HIGHLIGHTS
• Improved Exhaust Sound
• Faster Turbo Spool
PROFILE
The ARM 6" B58 Catted Downpipe is perfect if you're looking for all of the performance of a 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 their 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
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.
IN THE BOX
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 |
Returns may be accepted within 14 days of purchase pending Return Merchandise Authorization (RMA). No returns or cancellations on special order items. All returns will be charged a 20% restocking fee, no exceptions.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. Item must be able to be resold as new.
Several types of goods are exempt from being returned. Hazardous materials, fluids, greases, chemicals, and clothing are not able to return.
Free shipping is available within the lower 48 states for most orders totaling $199 or more. A free shipping option will be available during checkout. This offer is for delivery address in the continental United States and excludes shipments going to Alaska, Hawaii, Military Boxes, and items that require freight shipping.
Processing Time
Patterson Performance stocks a large quantity of items at any given time. Some items may require drop shipping from one of our various distributors. In stock items will ship within 1-2 business days. If you're needing your product quickly, please contact us to verify product availability before placing your order. Orders requiring additional verification (security concerns, incorrect information, etc.) may need additional processing time. Estimated shipping dates are not guaranteed and are subject to change based on inventory levels and manufacturer lead times. Backordered items are shipped immediately once available.
Items ship daily, If the item you ordered is not in stock, a member of our team will contact you via email / phone.
Patterson Performance will only ship to an address that varies from your billing address if payment is made via Paypal or a financing partner.
Patterson Performance ships from multiple warehouses throughout the United States, and sometimes from manufacturers overseas.
You can simply contact us via email / telephone for a live inventory check
Find more information at www.P65Warnings.ca.gov.