ARM Motorsports Midpipe Upgrade | F30 · F34 340i · F32 · F33 · F36 440i | 3.0L Turbo I6 [B58] B6 S4 4.2L V8 Forward Hole - 25% increase

Forward Hole - 25% increase over stock GTI 24mm bar

Engineered for mild street builds

Precision CNC-machined for secured sensor placement

When increasing the power output of your Audi B5 S4 engine

The included German made Continental throttle body offers the most power available from a size standpoint while allowing for an optimal-flow-designed adapter housing

ARM Motorsports Midpipe Upgrade | F30 · F34 340i · F32 · F33 · F36 440i | 3.0L Turbo I6 [B58] B6 S4 4.2L V8 Forward Hole - 25% increaseThe 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