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ARM Motorsports 3.5" Resonated Midpipe - BMW 335i / 335is 2007-2013
Lease for as low as $/week
HIGHLIGHTS
• Integrated Resonator for Refined Sound
• Improved Exhaust Flow
• Retains OEM Exhaust Valve Functionality
PROFILE
The ARM BMW 335i 3.5" Resonated Midpipe replaces the restrictive factory dual midpipes with a single, high-flow 3.5" design engineered to improve exhaust efficiency while delivering a deeper, smoother exhaust note. By merging the exhaust flow into a single, 3.5" midpipe, backpressure is reduced and overall exhaust flow is improved. The factory BMW 335i midpipe uses a dual midpipe design which incorporates secondary catalysts which prioritizes noise control and mass production over performance and sound quality. While effective for daily driving, the OEM setup creates unnecessary restriction and limits exhaust flow as power levels increase.
The ARM 335i 3.5" Single Midpipe is designed to connect directly to the factory axle-back section, allowing full retention of the OEM exhaust valve controllers and factory valve operation. This maintains OEM drivability and comfort in normal driving conditions while unlocking a more aggressive and engaging sound under throttle. The ARM 335i 3.5" Resonated Single Midpipe prioritizes exhaust note and performance. The integrated resonator is carefully sized and positioned to reduce rasp and harsh frequencies commonly associated with straight-through midpipes, especially on N54 and N55 platforms.
CONSTRUCTION
The ARM 335i 3.5" Single Midpipe begins with a dual 2-bolt flange design which allows you to connect it with any downpipes that mate up to the OEM 335i midpipe. This allows the midpipe to bolt directly to any downpipes that are designed to mate to the OEM 335i midpipe, including factory downpipes as well as most aftermarket downpipes that retain the OEM-style 2-bolt outlet configuration.
It then transitions smoothly to the 3.5" single midpipe section. This section incorporates a single resonator to deepen and improve the exhaust note by reducing rasp and high-pitched tones. The resonator is designed to attenuate high-frequency and raspy exhaust notes commonly associated with turbocharged BMW engines, while preserving a deep, aggressive tone under acceleration. The result is a smoother, more controlled exhaust sound without introducing excessive restriction or drone.
Towards the rear section of the ARM 335i 3.5" Midpipe splits back to a dual design to connect with the OEM axle-back exhaust section. By retaining the factory dual outlet layout at the rear, the ARM midpipe preserves full compatibility with the OEM axle-back and its integrated exhaust valve system. This ensures proper exhaust flow distribution, correct valve operation, and OEM-level fitment, while maintaining the performance and sound benefits of the single 3.5" midpipe design throughout the center section.
To allow for clearance of the OEM chassis brace, the ARM 335i 3.5" Resonated Midpipe includes two precision machined aluminum chassis brace spacers which allow extra space for the larger 3.5" ARM Midpipe to pass through to the axle-back section. This solution allows the larger midpipe to pass through without contact or vibration while retaining the factory chassis brace and its structural function. The spacers are designed specifically for correct fitment and alignment, ensuring a clean installation without cutting, bending, or permanent modification to the vehicle.
IN THE BOX
• 3.5" Single Midpipe Rear Section
• 2x Chassis Brace Spacers
• 2x Downpipe Gaskets
• Mounting Hardware
FITMENT GUIDE
| Make | Chassis | Model | Engine |
| BMW | E90 | 335i | N54 3.0L |
| BMW | E90 | 335i | N55 3.0L |
| BMW | E92 | 335i | N54 3.0L |
| BMW | E92 | 335is | N54 3.0L |
| BMW | E92 | 335i | N55 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.