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 Midpipe Upgrade - BMW 340i / 440i B58 (F3x) 2017-2021
Lease for as low as $/week
HIGHLIGHTS
• Lighter Than OEM
• Maintains OEM Muffler
• SS304 Stainless Steel
• Smooth Mandrel Bent Tubing
PROFILE
The ARM 340i Midpipe significantly improves the sound of your B58, giving it the aggressive exhaust note you're looking for from a tuned B58-powered BMW. Designed to amplify the power and sound of your B58, the ARM 340i Midpipe eliminates the two central resonators found in the stock 340i midpipe. By retaining the OEM muffler you still have the ability to control the volume of your exhaust. Switch your car into Sport Plus and enjoy the sounds of the upgraded B58 sing, or flip it into comfort mode to drive through the neighborhood.
CONSTRUCTION
The ARM 340i Midpipe will allow for perfect fitment, sitting well within the recess for the exhaust underneath the vehicle. It has also been engineered to sit at or above any other portions of the car, giving you adequate clearance, even if you're on a lowered suspension.
The ARM 340i Midpipe is designed to fit either the OEM downpipe, or any upgraded downpipe that fits the OEM midpipe. The ARM 340i Midpipe utilizes the OEM midpipe mounting location to secure the midpipe during aggressive driving.
The ARM 340i Midpipe is comprised of two sections, the longer front section and the shorter rear section. The two sections of the ARM 340i Midpipe are joined with a slip-fit style connection and high quality performance-grade exhaust clamps. The ARM 340i Midpipe upgrade deletes the two OEM resonators opening up the sound of your B58. 
The ARM 340i Midpipe utilizes a full 3.25” system throughout, from the downpipe all the way to the muffler.
IN THE BOX
• 1x ARM B58 Midpipe Rear Section
• 4x Exhaust Clamps
FITMENT GUIDE
| Make | Model | Submodel | Engine |
|---|---|---|---|
| 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 | F34 | 340i Gran Turismo | B58 3.0L |
| BMW | F34 | 340i Gran Turismo xDrive | B58 3.0L |
| BMW | F36 | 440i Gran Coupe | B58 3.0L |
| BMW | F36 | 440i Gran Coupe xDrive |
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.