Dinan 19-26 BMW Z4 M40i Cold Air Intake

The factory B58 airbox in the Z4 M40i and GR Supra is small, and it limits how much air the turbo can draw. Dinan's semi-open intake replaces it with a carbon fiber airbox that is considerably larger than stock and holds a bigger filter. Dinan rates it at up to 13 wheel horsepower and 14 lb-ft of torque on an otherwise stock car.

What you get

• Semi-open carbon fiber airbox in place of the factory intake box.
• About 60% more airbox volume than the stock unit, by Dinan's figures.
• Larger filter, with surface area going from roughly 82 to 115 square inches.
• Higher flow: Dinan says it moves 58% or more air than the factory intake.

Good to know

• Dinan's gain figures were measured on a completely stock vehicle.

Brand: Dinan · Part #: D760-0065

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.