Dinan Free Flow Axle-Back Exhaust, Black Tips - BMW M340i/M440i (G20/G22/G23)

Dinan's axle-back for the G20 M340i and G2x M440i adds a quad-tip layout and a second exhaust valve. With the valves open it flows and sounds close to a straight pipe. With them closed, all the exhaust goes through the muffler and out the two inner tips.

What you get

• 76 mm piping (vs 70 mm stock) in 304 stainless steel.
• Twin 76 mm exhaust valves: the factory actuator is reused and a second one is added on the other side.
• Quad 4 in double-wall clamp-on tips, black ceramic coated, with a straight-cut design and laser engraving.
• About 4 lb lighter than the factory system.
• Mounting hardware included.

Good to know

• Dinan quotes +6 hp and +5 lb-ft at 6,600 rpm.
• The factory computer-controlled valve logic stays, so it's quieter at low speed.

Brand: Dinan · Part #: D660-0085-BLK

Ships from the brand or distributor, usually in 3-7 business days.

• Ships from the brand or distributor, usually in 3–7 business days.
• Shipping is charged at the carrier's rate, shown at checkout. Orders over 70 lb ship by freight for a flat $99.
• Unused parts can be returned within 30 days. Some items are marked no-refund in their description.

Full details are on our shipping and returns page.