ARM 3.5" Resonated Midpipe for BMW 335i

Overview

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.

Details

Highlights

• 3.5" Single Midpipe Design
• Integrated Resonator for Refined Sound
• Improved Exhaust Flow
• Retains OEM Exhaust Valve Functionality

Construction

• Dual 2-bolt flange design
• Smooth transition to 3.5" single midpipe section
• Splits back to dual design to connect with the OEM axle-back exhaust section
• Two precision machined aluminum chassis brace spacers

What's in the Box

• 3.5" Single Midpipe Front Section
• 3.5" Single Midpipe Rear Section
• 2x Axle-Back Adapter Pipes
• 2x Chassis Brace Spacers
• 2x Downpipe Gaskets
• Mounting Hardware

Warranty & Off-Road Use

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.

Fitment

RWD VEHICLES ONLY

Watch: Video